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Intel 80C51FA, 83C51FA External Program Memory Read Cycle, External Data Memory Read Cycle

Models: 80C51FA 83C51FA

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AUTOMOTIVE 80C51FA/83C51FA

EXTERNAL PROGRAM MEMORY READ CYCLE

270501 ±12

EXTERNAL DATA MEMORY READ CYCLE

270501 ±13

EXTERNAL DATA MEMORY WRITE CYCLE

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Page 11

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Intel 80C51FA External Program Memory Read Cycle, External Data Memory Read Cycle, External Data Memory Write Cycle

Contents

Automotive MEMORY ORGANIZATION80C51FA/83C51FA EVENT-CONTROL CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER AUTOMOTIVE 80C51FA/83C51FA Figure 1. 83C51FA Block DiagramFigure 2. MCS 51 Microcontroller Product Family Nomenclature 80C51FA/83C51FA PRODUCT OPTIONSTable 1. Temperature Options Alternate Function PIN DESCRIPTIONSDiagrams are for pin reference only. Package sizes are not to scale Port PinFigure 4. Oscillator Connections OSCILLATOR CHARACTERISTICSPort Pin Alternate FunctionONCE MODE POWER DOWN MODEIDLE MODE DESIGN CONSIDERATIONParameter SymbolABSOLUTE MAXIMUM RATINGS Unit Symbolsignal may exceed 0.8V. In these cases, it may be desirable to qualify ALE with a Schmitt Trigger, or use an Address Latch ParameterFigure 6. ICC vs Frequency Figure 7. ICC Test Condition, Active Mode All other pins disconnectedFigure 9. ICC Test Condition Power Down Mode All other pins disconnected VCC e 2.0V toEXTERNAL MEMORY CHARACTERISTICS EXPLANATION OF THE AC SYMBOLSAUTOMOTIVE 80C51FA/83C51FA EXTERNAL PROGRAM MEMORY READ CYCLEEXTERNAL DATA MEMORY READ CYCLE EXTERNAL DATA MEMORY WRITE CYCLEEXTERNAL CLOCK DRIVE WAVEFORM SERIAL PORT TIMING-SHIFT REGISTER MODESHIFT REGISTER MODE TIMING WAVEFORMS EXTERNAL CLOCK DRIVEFLOAT WAVEFORMS DATASHEET REVISION HISTORYAC TESTING INPUT, OUTPUT WAVEFORMS