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Intel 83C51FA manual

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Table of contents for the manual

  • Page 1

    * Other brands and names are the property of their respective owners. Information in this document is provided in connection with Intel products. Intel assumes no liability whatsoever, including infringement of any patent or copyright, for sale and use of Intel products except as provided in Intel's Terms and Conditions of Sale for such produc[...]

  • Page 2

    AUTOMOTIVE 80C51FA/83C51FA 270501 ± 1 Figure 1. 83C51FA Block Diagram 2[...]

  • Page 3

    AUTOMOTIVE 80C51FA/83C51FA 80C51FA/83C51FA PRODUCT OPTIONS Intel’s extended and automotive temperature range product s are designed to meet the needs of those application s whose operating requirements exceed commercia l standards. Wit h the commercial standard temperature range, operationa l characteristics are guaranteed over the temperatur e r[...]

  • Page 4

    AUTOMOTIVE 80C51FA/83C51FA PIN DESCRIPTIONS V CC : Supply voltage. V SS : Circuit ground. Port 0 : Port 0 is an 8-bit, open drain, bidirectional I/O port. As an output port each pin can sink several LS TTL inputs. Port 0 pins that have 1's written to them float, and in that state can be used as high-im- pedance inputs. Port 0 is also the multi[...]

  • Page 5

    AUTOMOTIVE 80C51FA/83C51FA addresses (MOVX @ Ri), Port 2 emits the contents of the P2 Special Function Register. Port 3 : Port 3 is an 8-bit bidirectional I/O port with internal pullups. The Port 3 output buffers can drive LS TTL inputs. Port 3 pins that have 1's written to them are pulled high by the internal pullups, and in that state can be[...]

  • Page 6

    AUTOMOTIVE 80C51FA/83C51FA 270501 ± 6 Figure 5. External Clock Drive Configuration IDLE MODE The user's software can invoke the Idle Mode. When the microcontroller is in this mode, power consump- tion is reduced. The Special Function Registers and the onboard RAM retain their values during Idle, but the processor stops executing instructions.[...]

  • Page 7

    AUTOMOTIVE 80C51FA/83C51FA ABSOLUTE MAXIMUM RATINGS * Ambient Temperature Under Bias ...................................-40°C to +125°C Storage Temperature .......................-65°C to +150°C Voltage on Any Other Pin to V SS ........-0.5V to +6.5V I OL I/O Pin ........................................................15mA Power Dissipation (Ba[...]

  • Page 8

    AUTOMOTIVE 80C51FA/83C51FA DC CHARACTERISTICS : (T A eb 40 § Ct o a 125 § C; V CC e 5V g 10%; V SS e 0V) (Continued) Symbol Parameter Min Typ Max Unit Test Conditions I TL Logical 1 to 0 Transition Current b 265 b 650 m AV IN e 2V (Ports 1, 2, and 3) RRST RST Pulldown Resistor 40 100 225 K X CIO Pin Capacitance 10 pF @ 1MHz, 25 § C I CC Power Su[...]

  • Page 9

    AUTOMOTIVE 80C51FA/83C51FA 270501 ± 7 I CC Max at other frequencies is given by: Active Mode I CC Max e (3 c Osc Freq) a 4 Idle Mode I CC Max e (0.49 c Osc Freq) a 1.6 Where Osc Freq is in MHz, I CC is in mA. Figure 6. I CC vs Frequency 270501 ± 8 TCLCH e TCHCL e 5n s Figure 7. I CC Test Condition, Active Mode All other pins disconnected. 270501 [...]

  • Page 10

    AUTOMOTIVE 80C51FA/83C51FA EXPLANATION OF THE AC SYMBOLS Each timing symbol has 5 characters. The first char- acter is always a `T' (stands for time). The other characters, depending on their positions, stand for the name of a signal or the logical status of that signal. The following is a list of all the characters and what they stand for. A:[...]

  • Page 11

    AUTOMOTIVE 80C51FA/83C51FA EXTERNAL PROGRAM MEMORY READ CYCLE 270501 ± 12 EXTERNAL DATA MEMORY READ CYCLE 270501 ± 13 EXTERNAL DATA MEMORY WRITE CYCLE 270501 ± 14 11[...]

  • Page 12

    AUTOMOTIVE 80C51FA/83C51FA SERIAL PORT TIMING-SHIFT REGISTER MODE Test Conditions : T A eb 40 § Ct o a 125 § C; V CC e 5V g 10%; V SS e 0V; Load Capacitance e 80 pF Symbol Parameter 12 MHz Oscillator Variable Oscillator Units Min Max Min Max T XLXL Serial Port Clock Cycle Time 1 12T CLCL m s T QVXH Output Data Setup to Clock 700 10T CLCL b 133 ns[...]

  • Page 13

    AUTOMOTIVE 80C51FA/83C51FA AC TESTING INPUT, OUTPUT WAVEFORMS 270501 ± 17 AC Inputs during testing are driven at V CC b 0.5V for a Logic ``1'' and 0.45V for a Logic ``0''. Timing measurements are made at V IH min for a Logic ``1'' and V OL max for a Logic ``0''. FLOAT WAVEFORMS 270501 ± 18 For timing purpos[...]