SMC Networks AHB SRAM/NOR manual

Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Pr imeCell ® AHB SRAM/NOR Memor y Controller (PL241) Revisi on: r0p1 T echnical Ref erence Man ual[...]

ii Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B PrimeCell AHB SRAM/NOR Me mory Controller (PL241) T echnical Reference Manual Copyright © 2006 A RM Limited. All rights reserv ed. Release Information The following changes ha ve been made to this book. Proprietary Notice W ords and logos mar ked with ® or ™ are re gistered tr[...]

ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. iii Contents PrimeCell AHB SRAM/NOR Memory Controller (PL241) T ec hnical Reference Man ual Preface About this manual ............... ........................................................ .............. ..... x Feedback ........... .............. .............. .............. ....[...]

Contents iv Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Chapter 4 Programmer’s Model for Test 4.1 SMC integration test regist ers .............. .............. .............. .............. ............ 4-2 Chapter 5 Device Driver Requirements 5.1 Memory initialization ............ .............. ................. ..........[...]

ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. v List of T ab les PrimeCell AHB SRAM/NOR Memory Controller (PL241) T ec hnical Reference Man ual Change History ............. ........................................................ ...................... ............ ...... ii Table 2-1 Static memory clocking options .............[...]

List of Tables vi Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Table 2-21 Synchronous read and asynchronous write opmode chip register settings ............ 2-37 Table 3-1 Register summary ...................... .............. .............. .............. .............. .............. ......... 3-4 Table 3-2 smc_memc_status Re[...]

ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. vii List of Figures PrimeCell AHB SRAM/NOR Memory Controller (PL241) T ec hnical Reference Man ual Key to timing diagram conventions ................. .. ......... .............. .............. .............. ....... xii Figure 1-1 AHB MC (PL241) configuration ................. .....[...]

List of Figures viii Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Figure 2-20 Synchrono us burst read in multiplexed-mo de ............... .............. .............. ............. 2-34 Figure 2-21 Synchronous burst write ....................... .............. ................. .............. .............. ....... 2-3 5 Figu[...]

ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. ix Preface This preface introduces the PrimeCell AHB SRAM/NOR Memory Contro ller (MC) (PL241) T echnical Reference Manual . It contains the following sections: • About this manual on pag e x • F eedback on page xiv.[...]

Preface x Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B About this manual This is the T ec hnical Refer ence Manual (TRM) for the PrimeCell AHB SRAM/NOR Memory Contr oller . Product revision status The r n p n identifier indicates the re vision statu s of the product described in this manual, where: r n Identifies the major re v[...]

Preface ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. xi App en dix A Signal Descriptions Read this appendix for a description of the AHB MC input and outp ut signals. Glossary Read the Glossary for def initions of terms u sed in this manual. Con ventions Con ventions that this manual can use are described in: • T ypographical[...]

Preface xii Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Note Angle brackets can also enclose a permitted range of v alues. The example, <0-3>, sho ws that in name e xtensions, only one of the values 0, 1, 2, or 3 is valid. Timing diagrams The figure named Ke y to ti ming diagr am con ventions explains the components us e[...]

Preface ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. xiii Pref ix B Denotes AXI write response channel signals. Pref ix C Denotes AXI low-po wer interface signals. Pref ix H Denotes Advanced High-performance Bus (AHB) signals. Pref ix P Denotes Advanced P eripher al Bus ( APB) signals. Pref ix R Denotes AXI read data channel si[...]

Preface xiv Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Feedback ARM Limited welcomes feedback on the AHB MC and its documentation . Feedbac k on this pr oduct If you hav e any comments or suggestions about this product, contact your supplier giving: • the product name • a concise explanati on of your comments. Feedbac k o[...]

ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 1-1 Chapter 1 Intr oduction This chapter introduces the AHB MC. It contains the following sections: • About the AHB MC on page 1-2 • Supported devices on page 1-5 .[...]

Introduction 1-2 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B 1.1 About the AHB MC The AHB MC is an Advanced Micr ocontr oller Bus Ar chitectur e (AMBA) compliant System-on-Chip (SoC) peripheral. It is dev eloped, tested, and licensed by ARM Limited. The AHB MC takes adv antage of the ne wly developed Static Memory Contr oller [...]

Introduction ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 1-3 1.1.1 AHB interface The interface con verts the inco ming AHB transfers to the protocol used internally by the AHB MC. The interface has the follo wing features: • all AHB fix ed length burst types are directly transl ated to f ixed length b ursts • all undefined[...]

Introduction 1-4 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B 1.1.3 SMC The SMC is a high-performance, area- optimized SRAM mem ory controller . The SMC is pre-configured and v a lidated for: • the SRAM memory type • the number of SRAM memory devices • the maxi mum SRAM memory widt h. The SRAM memory interface type is def[...]

Introduction ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 1-5 1.2 Suppor ted de vices The SMC supports SRAM/NOR, see SMC on page 1-4. The Release Note provides a specific list of memory de vices tested with each conf iguration. Some memory de vices or series of memo ry de vices hav e specif ic requirements: Intel W18 series NOR[...]

Introduction 1-6 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B[...]

ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-1 Chapter 2 Functional Overview This chapter describes the major components of the AHB MC and ho w they operate. It contains the follo wing sections: • Functional descriptio n on page 2-2 • SMC on page 2-4 • Functional operation on page 2-7. • SMC functiona l oper ation on [...]

Functional Overview 2-2 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B 2.1 Functional description Figure 2-1 shows an AHB MC (PL241) conf iguration. Figure 2-1 AHB MC (PL2 41) configuration This section is divided into: • AHB interface • AHB to APB bridge • Clock domains on page 2-3 • Low-power interface on page 2-3 • S[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-3 2.1.3 Clock doma ins The memory controller has two clock domains: AHB clock doma in This is clocked by hclk , smc_aclk and reset b y hresetn . Static memory clock domain This is clocked by smc_mclk0 , smc_mclk0n and reset by smc_mreset0n . Figure 2-2 shows the[...]

Functional Overview 2-4 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B 2.2 SMC Figure 2-3 shows a block diagram of the SMC. Figure 2-3 S MC bloc k diagram The main blocks of the SMC are: • SMC interface on page 2-5 • APB slave int erface on page 2-5 • Fo r m a t on page 2-5 • Memory man age r on page 2-5 • Memory interf[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-5 2.2.1 SMC inte rface The SMC interface processes the incoming AHB transfers and sends them to the command format block. 2.2.2 APB sla ve inte rface The SMC has 4KB of memory allocated to it. The APB slav e interface accesses the SMC re gisters to program the m[...]

Functional Overview 2-6 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B 2.2.6 P ad interface The pad interface module provides a re gist ered I/O interface for data a nd control signals. It also con tains interrupt generation lo gic. Figure 2-4 sh o ws the SRAM pad interface exte rnal signals. Clock and reset signals are omitted. [...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-7 2.3 Functional operation This section is divided into: • AHB interface operation • AHB to APB bridge oper ation on page 2-10 • Clock domain operation on page 2-11 • Low-power interface operation on page 2-12 • SMC functiona l oper ation on page 2-15.[...]

Functional Overview 2-8 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Undefined length INCR b ursts All undefined length INCR b ursts are con verted to INCR b ursts of length four . Many AHB masters rely on using undef ined length INCR bursts to access data. If each INCR transfer is processed as a sing le transfer by the interna[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-9 If transfers are described as non-buf ferable then the bridge must wait for the write response to indicate that th e transfer has been completed to memory . If numerous buf ferable writes are performed, followed b y a non-buf ferable write, then the bridge mus[...]

Functional Overview 2-10 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Registered HWDA T A The interconnect used within the AH B MC co ntains combinatorial paths for the write data. T o impro ve the synthesis timing, HWD A T A is registered and mak es these paths internal to the desi gn. Big-endian 32-bit mode The AHB MC support[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-11 Figure 2-6 AHBC memor y map The other fourteen 4KB regions are read as zero. The lo wer 16 bits of the AHB address decode the memory controller that is being used. An e xternal AHB decoder determines where in the system memory map, this 64KB re gion is locate[...]

Functional Overview 2-12 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Static memory c loc king options T able 2-1 lists the static memory clocking option s. 2.3.4 Low-po wer interfac e operation The memory controller has two lo w-power interfaces. These interfaces indicate whether the clock for a specif ic domain can be switche[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-13 an active output <domain>_cactive Where: <domain> is ahb or smc. Figure 2-7 explains the protocol for the interface b y sho wing a request to enter lo w-power mode . Figure 2-7 Request to enter low-power mode The memory controller recei ves a requ[...]

Functional Overview 2-14 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B The AHB domain accepts or denies requests ba sed on whether it is busy performing any transfers. Figure 2-9 shows that static memory controllers always accept requests after they ha ve performed the required operations to prepare the e xternal memory for the [...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-15 2.4 SMC functio nal operation This section describes: • Operat ing states • Clocking and r esets on page 2-16 • Miscellaneous signals on page 2-1 8 • APB slave interface operation on page 2-19 • F ormat block on page 2-19 • Memory manager operatio[...]

Functional Overview 2-16 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B The state transitions are: Ready to Reset When reset is asserted to the smc _aclk domain, it enters the Reset state. Reset to Ready When reset is deasserted to the smc_aclk domain, it enters the Ready state. Ready to Low-power The Low-po wer state is entered [...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-17 These clocks can be grouped into two clock domains: AHB domain smc_aclk is in this dom ain. Y ou can onl y stop the smc_aclk domain signals when the SMC is in lo w-power mode. Memory clock domain The smc_mclk0 and smc_mclk0n are in this domain. smc_mclk0n is [...]

Functional Overview 2-18 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Y ou can change both reset signals asynchronously to th eir respecti ve clock domain. Internally to the SMC the deassert ion of the hr esetn signal is synchronized to smc_aclk . The deas sertion of smc_mreset0n is synchronized internal ly to smc_mclk0 and smc[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-19 smc_msync0 When HIGH, indicates smc_mclk0 is synchronous to smc_aclk . Otherwise they are as yn chronous. Ensure that smc_msync0 is tied to the same v alue as smc_async0 . smc_rst_bypass Use this signal for A TPG testing onl y . T ie it LOW for normal operati[...]

Functional Overview 2-20 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B The SMC ensures the ordering of read transfers from a single port is m aintained RAR, and additionally that the ordering of write transfer s from a single master is maintained WA W. SRAM memory accesses This section describes: • Standar d SRAM access • Me[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-21 memory b ursts, terminat ing a memory transfer at the b urst boundary . Also ens ure the page size is an integer multiple of the burst length, to avoid a memory b urst crossing a page boundary . When the burst_align bit is not set, the SMC ignores the memory [...]

Functional Overview 2-22 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B 2.4.6 Memor y ma nager operation The memory manager module is responsi ble for controlling the state of the SMC and the updating of chip configuration registers. This subsection descr ibes: • Low-power oper ation • Chip configuration r e gisters • Dir e[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-23 The APB registers smc_set_cy cles and smc_set_opmode act as holding registers, the configuration registers within the manager are only updated if either: • the smc_direct_cmd Register indicates only a register update is t aking place • the smc_direct_cmd [...]

Functional Overview 2-24 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Direct comman ds The SMC enables code to be ex ecuted from the memory wh ile simultan eously , from the software perspecti ve, moving the same chip to a dif ferent operating mode. This is achiev ed by synchronizing the update of the chip configuration registe[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-25 Figure 2-12 Device pin mechanism :ULWHWLPLQJSDUDPHWHUV DQGRSHUDWLQJPRGHWR WKHPHPRUFRQWUROOHU KROGLQJUHJLVWHUV 6WDUW :ULWHUHTXLUHGH[WHUQDOFKLS VHOHFWQXPEHUDQGUHTXLUHG PRGHUHJLVWHUYDOXHWRW[...]

Functional Overview 2-26 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Figure 2-13 Software mechanism :ULWHWLPLQJSDUDPHWHUV DQGRSHUDWLQJPRGHWR WKHPHPRUFRQWUROOHU KROGLQJUHJLVWHUV 6WDUW :ULWHUHTXLUHGH[WHUQDOFKLS VHOHFWQXPEHUDQGUHTXLUHG PRGHUHJLVWHUYDOXHWRWKH[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-27 2.4.7 Interrupts oper ation The next read to an y chip select on th e appropriate memory interfa ce clears the interrupt. The interrupt outputs are generated through a combinati onal path from the rele vant input pin. This enables you to place the SMC in Low-[...]

Functional Overview 2-28 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Read data output by the memory device is also registered on the rising edge of smc_mcl k0n , equi v alent to the falling edge of smc_mclk0 , for asynchronous reads. For synchronous reads, read data is re gistered using the fed back clock, smc_fbclk_in . For s[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-29 Figure 2-14 Asynchronous read Asynchr onous read in m ultiple xed-mode T able 2-4 and T ab le 2-5 list the smc_opmode0_<0-3> and SRAM Register settings. Figure 2-15 shows a single asynchronous read transfer in multiplexed-SRAM mode, with t RC = 7, and t[...]

Functional Overview 2-30 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Note In multiplexed-mode, both address an d data are output by the SMC on the smc_data_out_0[31:0] output bus. Read data is accepted on the smc_data_in_0[31:0] bus . Asynchr onous write T able 2-6 and T able 2-7 list the smc_opmode0_<0-3> and SR AM Re g[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-31 Asynchronous writ e in multiplexed-mode T able 2-8 and T ab le 2-9 list the smc_opmode0_<0-3> and SRAM Register settings. Figure 2-17 shows an asynchronous w rite in multiplex ed-mode. t WC is sev en cy cles. t WP is four cycles, and is extended b y two[...]

Functional Overview 2-32 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Figure 2-18 shows a page read access, with an initial access time , t RC , of three c ycles, an output enable assertion delay , t CEOE , of two cycles a nd a page access time, t PC , of one cycle. Page mode is enabled in the SMC by settin g the opmode Registe[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-33 Figure 2-19 shows a b urst read with the smc_wait_0 output of the memory used to delay the transfer . Note • S ynchronous memories have a configuration re gister enabling smc_wait_0 to be asserted either on the same clock cycle as the delayed data or a c yc[...]

Functional Overview 2-34 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Synchr onous b urs t read in m ultiple xed-mode T able 2-14 and T able 2-15 list the smc_opmode0_<0-3> and SRAM Register settings. Figure 2-20 shows the same synchronous re a d burst transfer as Figure 2-19 on page 2-33, but in multiplex ed-mode. Figure[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-35 Synchronous burst write T able 2-16 and T able 2-17 list the sm c_opmo de0_<0- 3> and SRAM Re gister settings. Figure 2-21 sho ws a synchronous burst write transfer that is delayed by the smc_wait_0 signal. Y ou must configure the memory to assert smc_w[...]

Functional Overview 2-36 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0 389B Synchr onous b urs t write in m ultiple xed-mo de T able 2-18 and T able 2-19 list the smc_opmode0_<0-3> and SRAM Register settings. Figure 2-22 shows the same synchronous burst write as Figure 2-21 on page 2-35, b ut in multiplexed-mode. Figure 2-22 S[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-37 Synchronous read and asy nchr onous write T able 2-20 and T able 2-21 list the sm c_opmo de0_<0- 3> and SRAM Re gister settings. Figure 2-23 on pag e 2-38 sho ws the turnaround ti me t TR , enforced between synchronous read and asynchronous write. The t[...]

Functional Overview 2-38 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0 389B Figure 2-23 Synchronous read and asynchr onous write Programmi ng t RC and t WC when the controller oper ates in synchronous mode For t RC : • when using memory devices that are not w ait-enabled, you must program t RC to be the number of clock cycles requ[...]

Functional Overview ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 2-39 For t WC : • when using mem ory de vi ces that are not wait-enabled, you must program t WC to be the number of clock cycles required befo re the first data is writt en, follo wing the assertion of cs_n • when using memory devices that are wait-enabled, yo[...]

Functional Overview 2-40 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0 389B[...]

ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 3-1 Chapter 3 Pr ogrammer’ s Model This chapter describes the registers of the SMC and provides information for programming th e de v ice. It contains the follo wing sections: • About the pr ogr ammer’ s model on page 3-2 • Re gister summa ry on page 3-3 • Re gister descrip[...]

Programmer’s Model 3-2 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B 3.1 About the programmer’ s model The SMC has 4KB of memory allocated to it from a base address of 0x1000 to a maximum address of 0x1FFF . Figure 3-1 shows that the re gister map address range is split into the follo wing regions: SMC configuration r egiste[...]

Programmer’s Model ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 3-3 3.2 Register summar y Figure 3-2 shows the SMC configuration re gister map. Figure 3-2 SMC configuration register m ap Figure 3-3 shows the SMC chip< 0-3 > configuration register map: Figure 3-3 SMC chip configuration register map VPFBVHWBRSPRGH VPFBVHW[...]

Programmer’s Model 3-4 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Note Figure 3-3 on page 3-3 shows the maximum number of supported chips. If you intend to use fe wer , then the highest chip configura tion blocks of the correct type are read back as zero. Figure 3-4 shows the SMC user conf iguration memory register map. Fig[...]

Programmer’s Model ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 3-5 smc_set_cycles 0x1014 WO N /A See SMC Set Cycles Re gister at 0x1014 on page 3-11. smc_set_opmode 0x1018 WO N /A See SMC Set Opmode Re gister at 0x1018 on page 3-12. smc_refresh_period_0 0x1020 R/W 0x00000000 See SMC Refr esh P eriod 0 Re gister at 0x1020 on [...]

Programmer’s Model 3-6 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B 3.3 Register descriptions This section describes the SMC registers. 3.3.1 SMC Memory Controll er Status Regist er at 0x1000 The read-only smc_memc_st atus Re gister provides information on the configuration of the SMC and also the current state of the SMC. Th[...]

Programmer’s Model ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 3-7 3.3.2 SMC Memory Interface Co nfiguration Regis ter at 0x1004 The read-only smc_memif_cfg Register provides information on the configuration of the memory interface. This register cannot be read in the Reset state. Figure 3-7 shows the register bit assignment[...]

Programmer’s Model 3-8 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B 3.3.3 SMC Set Configuration Register at 0x1008 The write-only smc_memc_cf g_set Register enables the memory controller to be changed to Lo w-power state, and interrupts en abled. This register cannot be writt en to in the Reset state. Figure 3-8 sh ows the re[...]

Programmer’s Model ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 3-9 T able 3-4 lists the register bit assignments. 3.3.4 SMC Clear Configuration Regi ster at 0x100C The write-only smc_memc_cfg_clr Register enables the memory controller to be mov ed out of the Low-po wer state, and the in terrupts disabled. This register canno[...]

Programmer’s Model 3-10 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0 389B 3.3.5 SMC Direct Command Registe r at 0x1010 The write-only smc_direct_cmd Register passes commands to the external memory , and controls the updating of the chip configuration registers with values held in the set_opmode and set_cycles re gisters. This reg[...]

Programmer’s Model ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 3-11 3.3.6 SMC Set Cycles Registe r at 0x1014 This is the holding register for th e smc_set_cycles0_<n>. The write-only smc_set_cycles Re gister enables the time inte rval to be set for holding registers before data can be written to the mem ory manager spe[...]

Programmer’s Model 3-12 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0 389B 3.3.7 SMC Set Opmode Register at 0x1018 This register is the holding register for the smc_opmode0_<n> working registers. The write-only smc_set_opmode Register cannot be written to in eith er the Reset or Low-po wer state. Figure 3-12 sho ws the regis[...]

Programmer’s Model ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 3-13 T able 3-8 lists the register bit assignments. T able 3-8 smc_set_opmode Register bit assignments Bits Name Function [31:16] - Reserved, undef i ned, write as zero. [15:13] set_burst_align Holding register for v alue to be written to t he specif ic SRAM chip[...]

Programmer’s Model 3-14 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0 389B [9:7] set_wr_bl Holding register for value to be wr itten to the specific SRAM ch ip smc_opmode Register bls fie ld . Encodes the me mory b urst length: b000 = 1 beat b001 = 4 beats b010 = 8 beats b011 = 16 beats b100 = 32 beats b101 = continuous b110-b111 [...]

Programmer’s Model ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 3-15 3.3.8 SMC Refresh P eriod 0 Register at 0x1 020 The read/write smc_refresh_period_0 Register enables the AHB MC to perform refresh cycles for PSRAM de vices that you connect to memory interface 0. Y ou cannot access this register in either the Reset or low-p[...]

Programmer’s Model 3-16 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0 389B T able 3-10 lists the register bit assignments. 3.3.10 SMC Opmode Register s <0-3> at 0x1104, 0x1124, 0x 1144, 0x1164 There is an instance of the smc_opmode Regi ster for each chip supported. This register is read-only and cannot be read in the Reset [...]

Programmer’s Model ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 3-17 T able 3-11 lists the register bit assignments. T able 3-11 smc_opmode Register bit assignments Bits Name Function [31:24] address_match Returns the value of this ti e-off. This is the comparis on v alue for address bits [ 31:24] to determine the chip tha t [...]

Programmer’s Model 3-18 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0 389B 3.3.11 SMC User Status Regi ster at 0x1200 The smc_user_status Register is a general purpose read-only register that returns the state on the smc_user_status[7:0] primary inputs. Th e smc_user_status Register can be read in all states. Fi gure 3-16 sh o ws [...]

Programmer’s Model ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 3-19 3.3.12 SMC User Configuration Regist er at 0x1204 The smc_user_config Register is a general purp ose write-only register . This re gister s ets the v alue of the smc_user_config[7:0] primary outputs. The smc_user_confi g Register can be written in all st ate[...]

Programmer’s Model 3-20 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0 389B Figure 3-18 shows the correspondence between bits of the smc_ periph_id re gisters and the conceptual 32-bit Peripheral ID Register . Figure 3-18 smc_per iph_id Register bit assignments The following section describe the sm c_periph_id Registers • SMC P e[...]

Programmer’s Model ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 3-21 SMC P eriph eral Identifi cation Register 1 The smc_periph_id_1 Register is hard-coded and the fields within the re gister indicate the v alue. T able 3 -16 lists th e re gister bit assignments. SMC P eriph eral Identifi cation Register 2 The smc_periph_id_2[...]

Programmer’s Model 3-22 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0 389B 3.3.14 SMC PrimeCell Identifi cation Register s <0-3> at 0x1FF0- 0x1FFC The smc_pcell_id Regist ers are four 8-bit wide register s , that span address locations 0xFF0-0FFC . The registers can conceptually be treat ed as a single re gister that holds a[...]

Programmer’s Model ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 3-23 The following sections describe the smc_pcell_id Re gisters: • SMC PrimeCell Identification Re gister 0 • SMC PrimeCell Identification Re gister 1 • SMC PrimeCell Identification Re gister 2 on page 3-24 • SMC PrimeCell Identification Re gister 3 on p[...]

Programmer’s Model 3-24 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0 389B SMC PrimeCell Identi fication Register 2 The smc_pcell_id_2 Register is hard-coded an d the fields within the re gister indicate the value. T able 3-22 lists the register bit assignments. SMC PrimeCell Identi fication Register 3 The smc_pcell_id_3 Register [...]

ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 4-1 Chapter 4 Pr ogrammer’ s Model for T est This chapter describes the additional log ic for functional verif ication and production testing. It contains the following section: • SMC inte grati on test r e gister s on page 4-2.[...]

Programmer’s Model for Test 4-2 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B 4.1 SMC integration test registers T est registers are provided for integration testing . Figure 4-1 shows the SMC integration test register map. Figure 4-1 SMC integration test regi ster map T able 4-1 lists the SMC integration test registers. 4.1.1[...]

Programmer’s Model for Test ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 4-3 T able 4-2 lists the register bit assignments. 4.1.2 Integration Inputs Register at 0x1E04 The read-only smc_int_ inputs Re gister enables an e xtern al master to access the inputs of the SMC using the APB interf ace. This register is only fo r test.[...]

Programmer’s Model for Test 4-4 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B 4.1.3 Integration Outpu ts Register a t 0x1E08 The write-only smc_ int_output s Re gister enables an external master to access the outputs of the SMC using the APB interface. Th is re gister cannot be read in the Reset state. Figure 4-4 sho ws the re[...]

ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 5-1 Chapter 5 De vice Driver Requirements This chapter contains v arious flo w diagrams to aid in the de velopment of a software dri ver for the SMC. It cont ains the following section: • Memory initiali zation on page 5-2.[...]

Device Driver Requirements 5-2 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B 5.1 Memor y initialization Figure 5 -1 on page 5-3 and Figure 5-3 on page 5-5 shows the sequence of e vents that a device dri ver must carry out to initialize th e memory controller and a memory de vice to ensure the configuration of both i s synchroniz[...]

Device Driver Requirements ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 5-3 Figure 5-1 SMC and memory initia lization sheet 1 of 3 6WDUW 3VHXGR&RGHIRU¶VPFBVHWBFFOHV·6XEURXWLQH LQWVHWBFFOHVWWWWWWW^ ?[...]

Device Driver Requirements 5-4 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B Figure 5-2 SMC and memory initialization sheet 2 of 3 6KHHW ,V PHPRUGHYLFH 0RGH5HJDFFHVVHGE DGGUHVVDQGGDWD RUDGGUHVV RQO" 3VHXGR&RGHIRU¶VPFBGLUHFWBFPG·6XEURXWLQH LQWGLUHFWBFPGPHPB[...]

Device Driver Requirements ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. 5-5 Figure 5-3 SMC and memory initia lization sheet 3 of 3 Where: x = denotes the appropriate chip select. 6KHHW 9 HULI WKHQHZWLPLQJV DQGRSHUDWLQJ PRGH" (QG &KHFNIRUFRUUHFW VPFBVUDPBFFOHVB[ 5HJLVWHUFRQWHQWV <H [...]

Device Driver Requirements 5-6 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B[...]

ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. A-1 Appendix A Signal Descriptions This appendix lists and describes the processor signal s. It contains the follo wing sections: • About the signals li st on page A-2 • Clocks and r esets on page A-3 • AHB signals on page A-4 • SMC memory interface signals on page A-5 • SM[...]

Signal Descriptions A-2 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B A.1 About the signals list This appendix lists the PL241 signals. Figure A-1 shows how the signals are grouped. Figure A-1 AHB MC PL241 grouping of sig nals where: AHBC = AHB Configuration signals $+%0&3/ $+% 60& WLHRIIV /RZ [...]

Signal Descriptions ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. A-3 A.2 Clocks and resets T able A-1 lists the clock and reset signals. T able A-1 Cloc ks and resets Name T y pe Sour ce/ destination Description hclk Input Clock source AHB clock hreset n Input Reset source AHB clock domain reset smc_aclk Input Clock source SMC [...]

Signal Descriptions A-4 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B A.3 AHB signals T able A-2 lists the AHB signals. where: <x> = 0 or C, where C = Configuration. T able A-2 AHB signals Name T y pe Sour ce/ destination Description hsel<x> Input AHB T ransfer is to this port haddr<x>[31:0] Input AHB Address o[...]

Signal Descriptions ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. A-5 A.4 SMC memor y interface signals T able A-3 lists the SMC memory interface signals. T able A-3 SMC memory interface signals Name T ype Source/ destination Description smc_fbclk_in_0 Input Memory Fed back clock smc_data_in_0[31:0] Input Memory Data in smc_wait[...]

Signal Descriptions A-6 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B A.5 SMC miscellaneous signals T able A-4 lists the SMC miscellaneous signals. T able A-4 SMC miscellaneous signals Name T ype Source/ destination Description smc_async0 Input Tie-of f AHB clock synchronou s to memory clock smc_msync0 Input T ie-off Memory cloc[...]

Signal Descriptions ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. A-7 A.6 Low-power interface T able A-5 lists the lo w-power interf ace signals. T able A-5 Low-po wer interface signals Name T ype Source/ destination Description ahb_csysreq Input System controller AHB inte rfaces lo w-powe r mode request smc_csysreq Input System[...]

Signal Descriptions A-8 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B A.7 Configuration signal T able A-6 lists the co nf iguration signal. T able A-6 Configuratio n signal Name T ype Source/ destination Description big_endian Input T ie-off Big-endian mode conf iguration tie-off[...]

Signal Descriptions ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. A-9 A.8 Scan chains T able A-7 lists the scan chain signals. T able A-7 Scan c hain signals Name T ype Source/ destination Description se Input Scan chains Scan enable for all clock domains ahb_rst_bypa ss Input Scan chains AHB reset bypass smc_rst_bypass Input Sc[...]

Signal Descriptions A-10 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0389B[...]

ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. Glossary-1 Glossary This glossary describes some of the terms used in technical documents from ARM Limited. Adv anced High-per formance Bus (AHB) A bus protocol with a f ixed pipeline between address/control and data phases. It only supports a subset of the functionality provided by [...]

Glossary Glossary-2 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0 389B Adv anced Pe ripheral B us (APB) A simpler bus protocol than AHB. It is designed for use with ancillary or general-purpose peripherals such as timers, in t errupt controllers, U AR Ts, and I/O ports. Connection to the main system bus is throug h a system-to-perip[...]

Glossary ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. Glossary-3 Boundary scan chain A boundary scan chain is made up of serially -connected de vices that implement boundary scan technology using a standard JT A G T AP interface. Each de vice contains at least one T AP controller containing shif t re gisters that form the chain[...]

Glossary Glossary-4 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0 389B SBO See Should Be One. SBZ See Should Be Ze ro. SBZP See Should Be Ze ro or Preserved. Scan chain A scan chain is made up of serially-connected de vices that implement boundary scan technology using a standard JT A G T AP interface. Each de vice contains at least[...]

Glossary ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. Glossary-5 Remapping Changing the address of physical memory or de vices after the ap plication has started ex ecuting. This is t ypically done to perm it RAM to replace R OM when the initialization has been completed. Reserved A f ield in a control regi ster or instruction [...]

Glossary Glossary-6 Copyright © 2006 ARM Limited. All rights reserved. ARM DDI 0 389B[...]