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Kawasaki 80C51 manual

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Table of contents for the manual

  • Page 1

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 1 of 120 Ver. 0.9 KS152JB2 1.0 INTR ODUCTION The 80C152 Uni versal Communications Controller is an 8-bit microcontroller designed for the intelligent management of peripheral systems or components. The 80C152 is a deri vati v e of the 80C51 and retains [...]

  • Page 2

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 2 of 120 Ver. 0.9 KS152JB2 POR T 4 DRIVERS POR T 0 DRIVERS POR T 2 DIR VERS RAM ADDRESS REGISTER RAM 256 X 8 POR T 4 LA TCH POR T 0 LA TCH POR T 2 LA TCH B REGISTER AC C TMP 2 ALU PSW TMP 1 GSC CONTR OL GMOD CRC GENERA TOR ADR O-3 BAUD RECEIVE FIFO AMSK[...]

  • Page 3

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 3 of 120 Ver. 0.9 KS152JB2 2.1 Pin Description T able 1: PIN DESCRIPTION Name Description Port 0 Port 0 is an 8-bit open drain bi-directional I/O Port. As an output port each pin can sink 8 LS TTL inputs. Port 0 pins that ha ve 1s written to them float[...]

  • Page 4

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 4 of 120 Ver. 0.9 KS152JB2 Port 3 Port 3 is an 8-bit bi-directional I/O port with internal pullups. Port 3 pins that ha v e 1s written to them are pulled high by the internal pullups, and in that state can be used as inputs. As inputs, Port 3 pins that [...]

  • Page 5

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 5 of 120 Ver. 0.9 KS152JB2 ALE Address Latch Enable output signal for latching the lo w byte of the address during accesses to external memory . In normal operation ALE is emitted at a constant rate of 1/6 the oscillator fre- quency , and may be used fo[...]

  • Page 6

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 6 of 120 Ver. 0.9 KS152JB2 2.2 Special function Registers The follo wing table lists the SFR’ s present in 80152. Note that not all the addresses are occupied by SFR’ s. The unoccupied addresses are not implemented and should not be used by the cus-[...]

  • Page 7

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 7 of 120 Ver. 0.9 KS152JB2 between the RST pin being pulled lo w and the internal reset being generated. During this time the CPU continues its normal operations. The internal reset signal clears the SFRs except the port SFRs which ha ve FFh written int[...]

  • Page 8

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 8 of 120 Ver. 0.9 KS152JB2 2.4 POR T STRUCTURES AND OPERA TION The ports are all bidirectional. Each port consists of two sections, the port SFR and the I/O pad. The Ports 0 and 2 are in v olved in accesses to e xternal memory . In this case, Port 0 out[...]

  • Page 9

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 9 of 120 Ver. 0.9 KS152JB2 As sho wn in Figure abov e, Ports 0 and 2 can emit either their respectiv e SFR contents or the ADDR/D A T A and ADDRESS bus, depending upon the control lines IDN AMX and IDN AHI. During external memory accesses, the P2 SFR re[...]

  • Page 10

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 10 of 120 Ver. 0.9 KS152JB2 Writing to a Port During the ex ecution of an instruction that changes the v alue of a port SFR, the ne w value arri v es at the port latch during S6P2. Ho we ver , the port latch contents do not appear on the port pins till [...]

  • Page 11

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 11 of 120 Ver. 0.9 KS152JB2 2.6 A CCESSING EXTERNAL MEMOR Y External Memory is accessed if either of the follo wing two conditions is met 1) The signal EA is lo w 2) Whene ver the program counter (PC) contains an address greater than 0FFFh. Accesses to [...]

  • Page 12

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 12 of 120 Ver. 0.9 KS152JB2 During External Memory Accesses, both Ports 0 and 2 are used for Address/ Data transfer and therefore cannot be used for general I/O purposes. During external program fetches, Port 2 uses strong pullups to emit 1s. 2.7 TIMER/[...]

  • Page 13

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 13 of 120 Ver. 0.9 KS152JB2 The “T imer” or “Counter” function is selected by the “C/T” bit in the TMOD Special Function Register . Each T imer/Counter has one selection bit for its o wn; bit 2 of TMOD selects the func- tion for T imer/Count[...]

  • Page 14

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 14 of 120 Ver. 0.9 KS152JB2 MODE 1 Mode 1 is similar to Mode 0 except that the counting re gister form a 16 bit counter , rather than a 13 bit counter . This means that all the bits of THx and TLx are used. . MODE 2 In Mode 2, the timer/counter is in th[...]

  • Page 15

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 15 of 120 Ver. 0.9 KS152JB2 Mode 3 is used in cases where an extra 8 bit timer is needed. W ith T imer 0 in Mode 3, T imer 1 can be turned on and of f by switching it out of and into its own Mode 3. It can also be used as a baud rate generator for the s[...]

  • Page 16

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 16 of 120 Ver. 0.9 KS152JB2 case of le vel triggered interrupt, the IE0 and IE1 flags are not cleared and will ha ve to be cleared by the software. This is because in the le vel acti v ated mode, it is the e xternal requesting source that controls the [...]

  • Page 17

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 17 of 120 Ver. 0.9 KS152JB2 Interrupt enable register for DMA and GSC interrupts. A 1 in an y bit position enables that interrupt. IEN1.0 (EGSR V) - Enables the GSC valid recei v e interrupt. IEN1.1 (EGSRE) - Enables the GSC recei ve error interrupt. IE[...]

  • Page 18

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 18 of 120 Ver. 0.9 KS152JB2 The interrupt flags are sampled in S5P2 of e very machine c ycle. In the next machine c ycle, the sampled interrupts are polled and their priority is resolved. If certain conditions are met then the hardware will e x ecute a[...]

  • Page 19

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 19 of 120 Ver. 0.9 KS152JB2 Execution continues from the v ectored address till an RETI instruction is ex ecuted. On ex ecution of the RETI instruction the processor pops the Stack and loads the PC with the contents at the top of the stack. The user mus[...]

  • Page 20

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 20 of 120 Ver. 0.9 KS152JB2 v alues are polled only in the next machine c ycle. If a request is activ e and all three conditions are met, then the hardware generated LCALL is e x ecuted. This call itself takes tw o machine c ycles to be completed. Thus [...]

  • Page 21

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 21 of 120 Ver. 0.9 KS152JB2 2.9 P ower Down and Idle The processor has two Po wer Reduction modes, Idle and Po wer Do wn. Backup power is supplied through the VCC pin in these operations. The processor can be put into the Idle or the Po wer do wn mode b[...]

  • Page 22

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 22 of 120 Ver. 0.9 KS152JB2 There are two w ays to terminate the Idle mode. One way is to reset the processor and the other is by acti vation of an y enabled interrupt. On recei ving an interrupt, the processor will vector to the interrupt service routi[...]

  • Page 23

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 23 of 120 Ver. 0.9 KS152JB2 The DMA circuitry stops operation in both Idle and po wer Down modes. Since operation is stopped in both modes, the process should be similar in each case. Specific steps that need to be taken include: notification to other[...]

  • Page 24

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 24 of 120 Ver. 0.9 KS152JB2 MODE 1 In Mode 1, the full duplex mode is used. Serial communication frames are made up of 10 bits transmitted on TXD and recei ved on RXD. The 10 bits consist of a start bit (0), 8 data bits (LSB first), and a stop bit (1).[...]

  • Page 25

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 25 of 120 Ver. 0.9 KS152JB2 Reception is enabled only if REN is high. The serial port actually starts the recei ving of serial data, with the detection of a falling edge on the RxD pin. The 1-to-0 detector continuously moni- tors the RxD line sampling i[...]

  • Page 26

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 26 of 120 Ver. 0.9 KS152JB2 If these conditions are met, then the stop bit goes to RB8, the 8 data bits go into SBUF and RI is set. Else the recei ved frame may be lost. After the middle of the stop bit, the recei v er goes back to looking for a 1-to-0 [...]

  • Page 27

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 27 of 120 Ver. 0.9 KS152JB2 MODE 3 This mode is similar to Mode 2 in all respects, except that the baud rate is programmable. In all four modes, transmission is started by any instruction that uses SB UF as a destination regis- ter . Reception is initia[...]

  • Page 28

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 28 of 120 Ver. 0.9 KS152JB2 Baud Rates In Mode 0 the baud rate is fixed at 1/12 of the oscillator frequenc y . In Mode 2 the baud rate depends on the v alue of bit SMOD in PCON SFR. If SMOD is 0 then the baud rate is 1/64 of the oscillator frequency . [...]

  • Page 29

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 29 of 120 Ver. 0.9 KS152JB2 in auto-reload mode. In such a case the baud rate is gi ven by Mode 1,3 baud rate = 2 (SMOD - 5) X Oscillator Frequency / (12 x [256 - TH1]) It is also possible to achie ve v ery lo w baud rates by putting T imer 1 in Mode1 a[...]

  • Page 30

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 30 of 120 Ver. 0.9 KS152JB2 2.11 SINGLE-STEP OPERA TION The processor does not ha ve an y pin which can directly force it to operate in the single-step mode. Ho wev er the user can use the interrupt structure to obtain single-step operation. The user wi[...]

  • Page 31

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA Inc. Page 31 of 120 Ver. 0.9 KS152JB2 T able 8: Instruction T able lsn msn 012345 6 - 7 8 - F 0 nop ajmp ljmp rr a inc a inc d inc @ inc rn 1 jbc acall lcall rrc a dec a dec d dec @ dec rn 2 jb ajmp ret rl a add a, # add a, d add a, @ add a, rn 3 jnb acall reti rl[...]

  • Page 32

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 32 of 120 Ver. 0.9 KS152JB2 3.0 GLOB AL SERIAL CHANNEL 3.1 Introduction The Global Serial Channel (GSC) is a multi-protocol, high performance serial interface tar geted for data rates up to 2 MBPS with on-chip clock recov ery , and 2.4 MBPS using the ex[...]

  • Page 33

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 33 of 120 Ver. 0.9 KS152JB2 T able 9: N-Not av ailable. M-Mandatory . O-Optional. P-Normally Preferred X-N/A Data Flags CRC Duplex Ack Addr recognition m a n c h ec st er nr z nr zi 0 1 1 1 1 1 1 0 1 1/ id le n o n e 1 6- bi t cc it 3 2 bi ta ut o h al [...]

  • Page 34

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 34 of 120 Ver. 0.9 KS152JB2 External clock Internal clock NM NOONOOOOONOOOO OONOOOOOOOOOOOOO Control cpu Control dma OOOOO1 OOOOOOOOOO OOOOO1 OOOOOOOOOO Raw Recei v e 111111111N 111111 Raw T ransmit 111111111N 111111 CSMA ONN1 P 1 OOM NOOOOOO SDLC NOOP [...]

  • Page 35

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 35 of 120 Ver. 0.9 KS152JB2 CRC: NONE 16-bit CCITT 32-bitA UTODIN II NNN 1 1 11N N 11111111 OOO O O OOOOOOOO1 1 OO OOO O O OOOOOOOO1 1 OO Half Duples Full Duplex OOO O O OOOOOOOOOOOO NNN O O OONNOOOONNNP Ackno wledge: None Hardware User defined. OOO O [...]

  • Page 36

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 36 of 120 Ver. 0.9 KS152JB2 Note 1: Programmable in Raw transmit or recei v e mode. Almost all the options a vailable from T able can be implemented with the proper software to per- form the functions that are necessary for the options selected. In T ab[...]

  • Page 37

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 37 of 120 Ver. 0.9 KS152JB2 be in some other mode than the user intends for a significant amount of time after reset. T o pre- vent unw anted GSC errors from occurring, the user should not enable the GSC or the GSC inter- rupts for 170 machine cycles ([...]

  • Page 38

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 38 of 120 Ver. 0.9 KS152JB2 PREAMBLE - The preamble is a series of alternating 1s and 0s. The length of the preamble is programmable to be 0, 8, 32, or 64 bits. The purpose of the preamble is to allo w all the recei vers to synchronize to the same clock[...]

  • Page 39

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 39 of 120 Ver. 0.9 KS152JB2 The CRC generato r , as sh o wn in figure bel o w , operates by taking each bit as it is rece i v ed and XOR’ing it with bit 31 of the current CRC. This result is then placed in temporary storage. The result of XOR’ing b[...]

  • Page 40

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 40 of 120 Ver. 0.9 KS152JB2 link remains high for 2 or more bit times. 3.2.3 INTERFRAME SP A CE The interframe space is the amount of time that transmission is delayed after the link is sensed as being idle and is used to separate transmitted frames. In[...]

  • Page 41

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 41 of 120 Ver. 0.9 KS152JB2 3.2.4 CSMA/CD D A T A ENCODING Manchester encoding/decoding is automatically selected when the user software selects CSMA/ CD transmission mode (See Figure belo w). In Manchester encoding the value of the bit is deter- mined [...]

  • Page 42

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 42 of 120 Ver. 0.9 KS152JB2 Narro w Pulses A v alid Manchester wa veform must stay high or lo w for at least a half bit-time, nominally 4 sam- ple-times. Jitter tolerance allo ws a wa veform which stays high or lo w for 3 sample-times to also be conside[...]

  • Page 43

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 43 of 120 Ver. 0.9 KS152JB2 3.2.6 RESOLUTION OF COLLISIONS Ho w the GSC responds to a detected collision depends on what it was doing at the time the colli- sion was detected. What it might be doing is either transmitting or recei ving a frame, or it mi[...]

  • Page 44

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 44 of 120 Ver. 0.9 KS152JB2 If a transmitting 8XC152 detects a collision during the preamble/BOF part of the frame that it is trying to transmit, it will complete the preamble/BOF and then begin the jam signal in the first bit time after BOF . If the c[...]

  • Page 45

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 45 of 120 Ver. 0.9 KS152JB2 Random Backoff In either of the random algorithms, the first thing that happens after a collision is detected is that a I gets shifted into the TCDCNT (T ransmit Collision Detect Count) re gister , from the right. Thus if th[...]

  • Page 46

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 46 of 120 Ver. 0.9 KS152JB2 BK OFF starts counting do wn from its preload v alue, counting slot times. At any time, the current v alue in BK OFF can be read by the CPU, but CPU writes to BK OFF ha ve no ef fect. While BK OFF is counting do wn, if its cu[...]

  • Page 47

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 47 of 120 Ver. 0.9 KS152JB2 The highest slot assignment in the network is written by each station’ s software into its TCDCNT register . Normal the highest slot assignment is just the total number of stations that are going to participate in the backo[...]

  • Page 48

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 48 of 120 Ver. 0.9 KS152JB2 interframe space and the preamble length such that the ackno wledge is completed before IFS expires. This is normally done by programming IFS lar ger than the preamble. A transmitting station with HABEN enabled expects an ack[...]

  • Page 49

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 49 of 120 Ver. 0.9 KS152JB2 3.3 SDLC Operation SDLC is a communication protocol de veloped by IBM and widely used in industry . It is based on a primary/ secondary architecture and requires that each secondary station hav e a unique address. The seconda[...]

  • Page 50

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 50 of 120 Ver. 0.9 KS152JB2 number of address bits, but the automatic address recognition feature w orks on a maximum of 16- bits. In SDLC the address are normally unique for each station. Ho wev er , there are se v eral classes of messages that are int[...]

  • Page 51

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 51 of 120 Ver. 0.9 KS152JB2 that the correct remainder is left. The remainder that is checked for is 001110100001111B (1D0F Hex). If there is a mismatch, an error is generated. The user softw are has the option of enabling this interrupt so the CPU is n[...]

  • Page 52

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 52 of 120 Ver. 0.9 KS152JB2 required for implementing bit stuf fing and striping are incorporated into the GSC hardware. This makes the operation transparent to the user . About the only time this operation becomes apparent to the user , is if the actu[...]

  • Page 53

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 53 of 120 Ver. 0.9 KS152JB2 count must be done by the user software. The Hardw are Based Acknowledge option that is pro- vided in the C152 is not compatible with standard SDLC protocol. 3.3.8 PRIMAR Y/SECOND AR Y ST A TIONS All SDLC networks are based u[...]

  • Page 54

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 54 of 120 Ver. 0.9 KS152JB2 3.3.9 HDLC/SDLC COMP ARISON HDLC (High le vel Data Link Control) is a standard adopted by the International Standards Or ga- nization (ISO). The HDLC standard is defined in the ISO document # ISO6159 -HDLC unbal- anced class[...]

  • Page 55

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 55 of 120 Ver. 0.9 KS152JB2 3.5 USING THE GSC 3.5.1 LINE DISCIPLINE Line discipline is ho w the management of the transfer of data ov er the physical medium is con- trolled. T wo types of line discipline will be discussed in this section: full duplex an[...]

  • Page 56

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 56 of 120 Ver. 0.9 KS152JB2 Some of the general areas that will impact the ov erall scheme on ho w to incorporate future changes to the system are: 1) Communication of the change to all the stations or the primary station. 2) Maximum distance for commun[...]

  • Page 57

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 57 of 120 Ver. 0.9 KS152JB2 registers. On the DMA channel servicing the recei v er , the control re gister needs to be loaded as follo ws: DCONn.2 = 0, this sets the transfer mode so that response is to GSC interrupts and put the DMA control in alternat[...]

  • Page 58

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 58 of 120 Ver. 0.9 KS152JB2 this same DMA bit. The interrupts EGSTE (IEN1.5), GSC transmit error; EGSTV (IEN1.3), GSC transmit v alid; EGSRE (IEN1.1), GSC recei ve error; and EGSR V (IEN1.0), GSC recei ve v alid; need to be enabled. The DMA interrupts a[...]

  • Page 59

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 59 of 120 Ver. 0.9 KS152JB2 specified in the data sheet. For a description of the use of the GSC with e xternal clock please read Section 3.5.11. 3.5.5 INITIALIZA TION Initialization can be broken do wn into two major components, 1) initialization of t[...]

  • Page 60

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 60 of 120 Ver. 0.9 KS152JB2 inquiry for the address check, a timer is also started. If the timer expires before the inquiry is responded to, then that station assumes the address chosen is okay . In the second procedure, an initializing station asks for[...]

  • Page 61

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 61 of 120 Ver. 0.9 KS152JB2 age and currents that the GSC is capable of providing are the same le v els as those for normal port operation. The signal used to enable the external dri v ers is DEN. No similar signal is needed for the recei ver . DEN is a[...]

  • Page 62

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 62 of 120 Ver. 0.9 KS152JB2 3.5.9 T ransmit W avef orms The CSC is capable of three types of data encoding, Manchester , NRZI, and NRZ. Figure sho ws example of all three types of data encoding. 1 0 1 10 0 “1” BIT TIME “1” BIT TIME “1” BIT T[...]

  • Page 63

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 63 of 120 Ver. 0.9 KS152JB2 3.5.10 Receiv er Clock Recovery The recei ver is al ways monitored at eight times the baud rate frequency , except when an e xternal clock is used. When using an external clock the recei v er is loaded during the clock cycle.[...]

  • Page 64

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 64 of 120 Ver. 0.9 KS152JB2 3.5.11 External Clocking T o select external clocking, the user is gi v en three choices. External clocking can be used with the transmitter , with the recei v er , or with both. T o select external clocking for the transmitt[...]

  • Page 65

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 65 of 120 Ver. 0.9 KS152JB2 to each station. When using 16-bit addressing, ADR0:ADR1 form one address and ADR2:ADR3 form the second address. If the recei ver is enabled, it looks for a matching address after e very BOF flag is detected. As the data is [...]

  • Page 66

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 66 of 120 Ver. 0.9 KS152JB2 and then writing to TFIFO. TEN must be set before loading the transmit FIFO, as setting TEN clears the transmit FIFO. TCDCNT should also be checked by user softw are and cleared if a col- lision occurred on a prior transmissi[...]

  • Page 67

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 67 of 120 Ver. 0.9 KS152JB2 expected. When this type of collision occurs the GSC automatically handles the retransmission attempts for as many as eight tries. If on the eighth attempt a collision occurs, the transmitter is disabled, although the jam and[...]

  • Page 68

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 68 of 120 Ver. 0.9 KS152JB2 would be one interframe space period after the line is sensed as being idle. As the number of stations approach 256 the probability of a successful transmission decreases rapidly . If there are more than 256 stations in v olv[...]

  • Page 69

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 69 of 120 Ver. 0.9 KS152JB2 bits. Writing a one to a bit in AMSK0,1 masks out that corresponding bit in ADDR0,1. B A UD (94H) -GSC Baud Rate Generator - Contains the v alue of the programmable baud rate. The data rate will equal (frequency of the oscill[...]

  • Page 70

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 70 of 120 Ver. 0.9 KS152JB2 can be masked in AMSK1:AMSK0. A recei v ed address of all ones will always be recognized in any mode. The user softw are is responsible for setting or clearing this flag. GMOD.5,6 (M0,M1) - Mode Select - T wo test modes, an [...]

  • Page 71

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 71 of 120 Ver. 0.9 KS152JB2 MYSLO T .0, 1,2,3,4,5 - Slot Address -The six address bits choose 1 of 64 slot addresses. Address 63 has the highest priority and address 1 has lo west. A v alue of zero will prev ent a station from transmitting during the co[...]

  • Page 72

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 72 of 120 Ver. 0.9 KS152JB2 PCON.3(XRCLK) -GSC External Recei ve Clock Enable- Writing a 1 to XRCLK enables an external clock to be applied to pin 5(Port 1.4). The e xternal clock is used to determine when bits are loaded into the recei ver . PCON.4 (GA[...]

  • Page 73

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 73 of 120 Ver. 0.9 KS152JB2 data. The recei ve FIFO is a three byte b uf fer into which the recei ve data is loaded. A CPU read of the FIFO retrie ves the oldest data and automatically updates the FIFO pointers. Setting GREN to a one will clear the rece[...]

  • Page 74

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 74 of 120 Ver. 0.9 KS152JB2 TCDCNT (0D4H) - T ransmit Collision Detect Count Contains the number of collisions that ha ve occurred if probabilistic CSMA/CD is used. The user software must clear this re gister before transmitting a ne w frame so that the[...]

  • Page 75

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 75 of 120 Ver. 0.9 KS152JB2 recei ved, TDN is not set. An ackno wledge is not expected follo wing a broadcast or multi-cast packet. The status of this flag is controlled by the GSC. TST A T .4(TCDT) - T ransmit Collision Detect - If set, indicates that[...]

  • Page 76

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 76 of 120 Ver. 0.9 KS152JB2 4.0 DMA Operation The C152 contains DMA (Direct Memory Accessing) logic to perform high speed data transfers between any tw o of Internal Data RAM Internal SFRs External Data RAM In external RAM is in volv ed, the Port 2 and [...]

  • Page 77

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 77 of 120 Ver. 0.9 KS152JB2 DMA Registers T wo bits in DCONn are used to specify the physical destination of the data transfer . These bits are D AS (Destination Address Space) and ID A (Increment Destination Address). If D AS = 0, the des- tination is [...]

  • Page 78

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 78 of 120 Ver. 0.9 KS152JB2 There are four modes in which the DMA channel can operate. These are selected by the bits DM and TM (Demand Mode and T ransfer Mode) in DCONn: The operating modes are described belo w . 4.1.1 AL TERN A TE CYCLE MODE In Altern[...]

  • Page 79

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 79 of 120 Ver. 0.9 KS152JB2 during the DMA, so interrupt flags may get set, but since program e xecution is suspended, the interrupts will not be serviced while the DMA is in progress. 4.1.3 SERIAL POR T DEMAND MODE In this mode the DMA can be used to [...]

  • Page 80

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 80 of 120 Ver. 0.9 KS152JB2 is still 1 and the DONE bit is still 0. An external interrupt is not generated in this case, since in le vel-acti v ated mode, pulling the pin to a logical 1 clears the interrupt flag. If the interrupt pin is then pulled lo [...]

  • Page 81

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 81 of 120 Ver. 0.9 KS152JB2 DMA T ransfer from Internal Memory to External Memory DMA T ransfer from External Memory to Internal Memory DMA T ransfer from External Memory to External Memory ALE PSEN P 0 INST P 2 PCH WR DMA D A T A OUT PCL INST D ARHn PC[...]

  • Page 82

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 82 of 120 Ver. 0.9 KS152JB2 4.3 Hold/Hold Acknowledge T wo operating modes of Hold/Hold Ackno wledge logic are a v ailable, and either or neither may be in v oked by software. In one mode, the C152 generates a Hold Request signal and a waits a Hold Ackn[...]

  • Page 83

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 83 of 120 Ver. 0.9 KS152JB2 The functions of the ARB and REQ bits in PCON, then, are 4.3.3 USING THE HOLD/HLD A A CKNO WLEDGE The HOLD/HOLD A logic only af fects DMA operation with external RAM and don’ t af fect other operations with external RAM, su[...]

  • Page 84

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 84 of 120 Ver. 0.9 KS152JB2 selects which CPU’ s ALE signal will be directed to the address latch. The Arbiter’ s ALE is selected if HLD A is high, and the Requester’ s ALE is selected if HLD A is lo w . The ALE Switch logic can be implemented as [...]

  • Page 85

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 85 of 120 Ver. 0.9 KS152JB2 When the arbiter wants to DMA the XRAM, it first acti v ates DMXRQ. This signal pre vents Q2 from being set if it is not already set.An output lo w from Q2 enables the arbiter to carry out its DMA to XRAM, and maintains an o[...]

  • Page 86

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 86 of 120 Ver. 0.9 KS152JB2 If the DMA is in alternate cycles mode, then each time DMA c ycle is completed DMXRQ goes to 0, thus de-acti v ating HLD. Once HLD has been de-acti v ate, it can’ t be re-asserted till after HLD A has been to go high (throu[...]

  • Page 87

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc.oup, Inc. Page 87 of 120 Ver. 0.9 KS152JB2 Cycle is ex ecuted, on-chip arbitration logic determines which type of cycle is to be e xecuted ne xt. Note that when an instruction is ex ecuted, if the instruction wrote to a DMA register (e xcluding PCON), then an[...]

  • Page 88

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 88 of 120 Ver. 0.9 KS152JB2 If the channel is configured to External Demand mode, then the first if-condition is not satisfied but the second one is. In that case the block of statements follo wing that if-condition and delim- ited by {...} is ex ecu[...]

  • Page 89

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 89 of 120 Ver. 0.9 KS152JB2 If the test for SARn = SBUF is true, and if the flag RI is set, mode_logic (n) returns as 1 and the remainder of the function is not ex ecuted. Otherwise, e xecution proceeds to then e xit if-condition, testing D ARn against[...]

  • Page 90

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 90 of 120 Ver. 0.9 KS152JB2 decides it wants to do Burst mode DMA. The sequence of e v ents might be: Instruction cycle (sets GO bit in DCON1) Instruction cycle (during which TFNF gets set) DMA0 cycle DMA1 cycle DMA1 cycle DMA1 cycle ...... DMA1 cycle ([...]

  • Page 91

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 91 of 120 Ver. 0.9 KS152JB2 4.5 Summary of DMA Contr ol Bits D AS specifies the Destination Address Space. If D AS = 0, the destination is in External Data Memory . If D AS = 1 and ID A = 0, the destination is a Special Function Register (SFR). If D AS[...]

  • Page 92

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 92 of 120 Ver. 0.9 KS152JB2 ARB enables the DMA logic to detect HLD and generate HLD A. After it has acti v ated HLD A, the C152 will not begin a ne w DMA to or from External Data Memory as long as HLD is seen to be acti ve. This logic is disabled when [...]

  • Page 93

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 93 of 120 Ver. 0.9 KS152JB2 As sho wn in Figure abov e, the Recei ve V alid interrupt can be signalled either by the RFNE flag (Recei ve FIFO Not Empty), or by the RDN flag (Recei v e Done). Which one of these flags causes the interrupt depends on th[...]

  • Page 94

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 94 of 120 Ver. 0.9 KS152JB2 Note that the locations of the basic 8051 interrupts are the same as in the rest of the MCS-51 Fam- ily . And relati ve to each other the y retain the same positions in the polling sequence. The locations of the ne w interrup[...]

  • Page 95

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 95 of 120 Ver. 0.9 KS152JB2 = 0 Disable EGSRE = 1 Enable GSC Recei ve Error Interrupt = 0 Disable EGSR V = 1 Enable GSC Receiv e V alid Interrupt = 0 Disable The two Interrupt Priority re gisters in the 8XC152 are as follo ws: Address of IP in SFR space[...]

  • Page 96

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 96 of 120 Ver. 0.9 KS152JB2 It is recommended that user software should ne ver write 1s to unimplemented bits in MCS-51 de vices. Further versions of the de vice may ha ve ne w bits installed in these locations. If so, their reset v alue will be 0. Old [...]

  • Page 97

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 97 of 120 Ver. 0.9 KS152JB2 The UR bit can be set only if the DMA bit in the TST A T is set. The DMA bit being set informs the GSC hardware that TFIFO is being serviced by DMA. In that case if the GSC goes to fetch another byte from TFIFO and finds it [...]

  • Page 98

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 98 of 120 Ver. 0.9 KS152JB2 RDN from being set. A CRC Error means the CRC generator did not come to its correct v alue after calculating the CRC of the message plus recei ved CRC. An alignment error means the number of bits recei v ed between the BOF an[...]

  • Page 99

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 99 of 120 Ver. 0.9 KS152JB2 AL - Address Length, see GMOD. AMSK0,1 (0D5H, 0E5H) - Address Match Mask 0,1 - Identifies which bits in ADR0,1 are “don’t care” bits. Setting a bit to 1 in AMSK0,1 identifies the corresponding bit in ADDR0,1 as not to[...]

  • Page 100

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 100 of 120 Ver. 0.9 KS152JB2 DCON0/1 (092H,093H) The DCON register control the operation of the DMA channels by determining the source of data to be transferred, the destination of the data to be transfer , and the v arious modes of operation. DCON.0 (G[...]

  • Page 101

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 101 of 120 Ver. 0.9 KS152JB2 P1.2 is programmed to a 1. DM - DMA Mode, see DCON0 DMA - Direct Memory Access mode, see TST A T . DONE - DMA done bit, see DCON0. DPH - Data Pointer High, an SFR that contains the high order byte of a general purpose pointe[...]

  • Page 102

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 102 of 120 Ver. 0.9 KS152JB2 GMOD.0 (PR) - Protocol - If set SDLC protocols with NRZI encoding, zero bit insertion, and SDLC flags are used. If cleared, CSMA/CD link access with Manchester encoding is used. GMOD.1,2 (PL0,1) - Preamble length PL1 PL0 LE[...]

  • Page 103

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 103 of 120 Ver. 0.9 KS152JB2 added to the 8051BH core to accomplish high-speed transfers of packetized serial data. GTxD - GSC T ransmit Data output, an alternate function of one of the port 1 pins (P1.1). This pin is used as the transmit output for the[...]

  • Page 104

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 104 of 120 Ver. 0.9 KS152JB2 IEN1 (0C8H) Interrupt enable register for DMA and GSC interrupts. A 1 in an y bit position enables that interrupt. IEN1.0 (EGSR V) - Enables the GSC valid recei v e interrupt. IEN1.1 (EGSRE) - Enables the GSC recei ve error [...]

  • Page 105

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 105 of 120 Ver. 0.9 KS152JB2 IPN1 (0F8H) Allo ws the user software two le v els of prioritization to be assigned to each of the interrupts in IEN1. A 1 assigns the corresponding interrupt in IEN1 a higher interrupt than an interrupt with a corresponding[...]

  • Page 106

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 106 of 120 Ver. 0.9 KS152JB2 MYSLO T .7 (DCJ) - Determines the type of Jam used during CSMA/CD operation when a collision occurs. If set to a 1 then a lo w D.C lev el is used as the jam signal. If cleared, then CRC is used as the jam signal. The jam is [...]

  • Page 107

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 107 of 120 Ver. 0.9 KS152JB2 PGSR V - Priority bit for GSC Receiv e V alid interrupt see IPN1. PGSTE - Priority bit for GSC T ransmit V alid interrupt, see IPN1. PL0 - One of the two bits that determines the Preamble Length, see GMOD. PL1 - One of the t[...]

  • Page 108

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 108 of 120 Ver. 0.9 KS152JB2 GREN has no ef fect on whether the recei v er detects a collision in CSMA/CD mode as the recei v er input circuitry always monitors the recei v e pin. RST A T .2 (RFNE) - Recei ve FIFO Not Empty - If set, indicates that the [...]

  • Page 109

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 109 of 120 Ver. 0.9 KS152JB2 SCON (098H) SCON.0 (RI) - Recei ve Interrupt Flag. SCON.1 - T ransmit Interrupt Flag. SCON.2 (RB8) - Recei v e Bit 8, contains the ninth bit that w as recei v ed in Modes 2 and 3 and stop bit in Mode 1 if SM20. Not used in M[...]

  • Page 110

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 110 of 120 Ver. 0.9 KS152JB2 TCON.3 (IE1) - External Interrupt 1 edge flag. TCON.4 (TR0) - T imer 0 run control bit. TCON.5 (TF0) - T imer 0 o verflo w flag. TCON.6 (TR1) - T ransmit Done flag, see TST A T . TCON.7 (TF1) - T imer 1 o verflo w flag[...]

  • Page 111

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 111 of 120 Ver. 0.9 KS152JB2 TMOD7 (GA TE) - Gating Mode bit for T imer 1. TST A T (0D8H) - Transmit Status Re gister TST A T .0 (DMA) - DMA Select - If set, indicates that DMA channels are used to service the GSC FIFO’ s and GSC interrupts occur on T[...]

  • Page 112

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 112 of 120 Ver. 0.9 KS152JB2 UR - Underrun Flag, see TST A T . XRCLK - External GSC Recei ve Clock Enable bit, see PCON. XTCLK - External GSC T ransmit Clock Enable bit, see GMOD. ............................... POR T 0 Port 0 is used as the multiplex e[...]

  • Page 113

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 113 of 120 Ver. 0.9 KS152JB2 D A T A POINTER HIGH This is the high byte of the 16-bit data pointer . The DPH is reset to 00h by a reset. There is unrestricted read/write access to this SFR. TIMER CONTR OL TF1 T imer 1 o verflo w flag: This bit is set [...]

  • Page 114

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 114 of 120 Ver. 0.9 KS152JB2 TIMER MODE CONTR OL GA TE Gating control: When this bit is set, T imer/counter x is enabled only while INTx pin is high and TRx control bit is set. When cleared, T imerx is enabled whene ver TRx con- trol bit is set. C/ T Ti[...]

  • Page 115

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 115 of 120 Ver. 0.9 KS152JB2 TL1.7-0 T imer 1 LSB The TL1 sfr is set to 00h on any reset. There is unrestricted read/write access to this SFR. TIMER 0 MSB TH0.7-0 T imer 0 MSB The TH0 sfr is set to 00h on any reset. There is unrestricted read/write acce[...]

  • Page 116

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 116 of 120 Ver. 0.9 KS152JB2 SERIAL POR T CONTR OL SM0 Serial port, Mode 0 bit: The operation of SM0 is described below . . SM1 Serial port Mode bit 1: SM0 SM1 Mode Description Length Baud rate 0 0 0 Synchronous 8 4/12 tclk 0 1 1 Asynchronous 10 v ariab[...]

  • Page 117

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 117 of 120 Ver. 0.9 KS152JB2 The SBUF sfr is set to 00h by a reset. There is unrestricted read/write access to this SFR. POR T 2 P2.7-0 Non-multiplexed address b us A15-A8: The port latch cannot be used for general I/O purposes but e xists to support th[...]

  • Page 118

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 118 of 120 Ver. 0.9 KS152JB2 CY Carry flag: Set for an arithmetic operation which results in a carry being generated from the ALU. It is also used as the accumulator for the bit operations. A C Auxiliary carry: Set when the pre vious operation resulted[...]

  • Page 119

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 119 of 120 Ver. 0.9 KS152JB2[...]

  • Page 120

    KS152JB Universal Communications Controller Technical Specifications Kawasaki LSI USA, Inc. Page 120 of 120 Ver. 0.9 KS152JB2[...]