Datasheet AT89C51 (Microchip) - 2
| Manufacturer | Microchip |
| Description | 8-bit Microcontroller with 4K Bytes Flash |
| Pages / Page | 17 / 2 — Block Diagram. AT89C51 |
| File Format / Size | PDF / 145 Kb |
| Document Language | English |
Block Diagram. AT89C51
Model Line for this Datasheet
- AT89C51-12AC AT89C51-12AI AT89C51-12JC AT89C51-12JI AT89C51-12PC AT89C51-12PI AT89C51-12QC AT89C51-12QI AT89C51-16AC AT89C51-16AI AT89C51-16JC AT89C51-16JI AT89C51-16PC AT89C51-16PI AT89C51-16QC AT89C51-16QI AT89C51-20AC AT89C51-20AI AT89C51-20JC AT89C51-20JI AT89C51-20PC AT89C51-20PI AT89C51-20QC AT89C51-20QI AT89C51-24AC AT89C51-24AI AT89C51-24JC AT89C51-24JI AT89C51-24PC AT89C51-24PI AT89C51-24QC AT89C51-24QI
Text Version of Document
Block Diagram
P0.0 - P0.7 P2.0 - P2.7 VCC PORT 0 DRIVERS PORT 2 DRIVERS GND RAM ADDR. PORT 0 PORT 2 RAM REGISTER LATCH LATCH FLASH PROGRAM B STACK ACC ADDRESS REGISTER POINTER REGISTER BUFFER TMP2 TMP1 PC ALU INCREMENTER INTERRUPT, SERIAL PORT, AND TIMER BLOCKS PROGRAM COUNTER PSW PSEN TIMING ALE/PROG INSTRUCTION AND DPTR REGISTER EA / V CONTROL PP RST PORT 1 PORT 3 LATCH LATCH OSC PORT 1 DRIVERS PORT 3 DRIVERS P1.0 - P1.7 P3.0 - P3.7
2 AT89C51
Document Outline Block Diagram Features Description Pin Description VCC GND Port 0 Port 1 Port 2 Port 3 RST ALE/PROG PSEN EA/VPP XTAL1 XTAL2 Oscillator Characteristics Status of External Pins During Idle and Power-down Modes Lock Bit Protection Modes Programming the Flash Programming Interface Flash Programming Modes Flash Programming and Verification Waveforms - High-voltage Mode (VPP = 12V) Flash Programming and Verification Waveforms - Low-voltage Mode (VPP = 5V) Flash Programming and Verification Characteristics Absolute Maximum Ratings* DC Characteristics AC Characteristics External Program and Data Memory Characteristics External Program Memory Read Cycle External Data Memory Read Cycle External Data Memory Write Cycle External Clock Drive Waveforms External Clock Drive Serial Port Timing: Shift Register Mode Test Conditions Shift Register Mode Timing Waveforms AC Testing Input/Output Waveforms(1) Float Waveforms(1) Ordering Information
P0.0 - P0.7 P2.0 - P2.7 VCC PORT 0 DRIVERS PORT 2 DRIVERS GND RAM ADDR. PORT 0 PORT 2 RAM REGISTER LATCH LATCH FLASH PROGRAM B STACK ACC ADDRESS REGISTER POINTER REGISTER BUFFER TMP2 TMP1 PC ALU INCREMENTER INTERRUPT, SERIAL PORT, AND TIMER BLOCKS PROGRAM COUNTER PSW PSEN TIMING ALE/PROG INSTRUCTION AND DPTR REGISTER EA / V CONTROL PP RST PORT 1 PORT 3 LATCH LATCH OSC PORT 1 DRIVERS PORT 3 DRIVERS P1.0 - P1.7 P3.0 - P3.7
2 AT89C51
Document Outline Block Diagram Features Description Pin Description VCC GND Port 0 Port 1 Port 2 Port 3 RST ALE/PROG PSEN EA/VPP XTAL1 XTAL2 Oscillator Characteristics Status of External Pins During Idle and Power-down Modes Lock Bit Protection Modes Programming the Flash Programming Interface Flash Programming Modes Flash Programming and Verification Waveforms - High-voltage Mode (VPP = 12V) Flash Programming and Verification Waveforms - Low-voltage Mode (VPP = 5V) Flash Programming and Verification Characteristics Absolute Maximum Ratings* DC Characteristics AC Characteristics External Program and Data Memory Characteristics External Program Memory Read Cycle External Data Memory Read Cycle External Data Memory Write Cycle External Clock Drive Waveforms External Clock Drive Serial Port Timing: Shift Register Mode Test Conditions Shift Register Mode Timing Waveforms AC Testing Input/Output Waveforms(1) Float Waveforms(1) Ordering Information
