Datasheet
Table Of Contents
- Features
- Description
- Block Diagram
- SFR Mapping
- Pin Configurations
- Oscillators
- Enhanced Features
- Dual Data Pointer Register DPTR
- Expanded RAM (XRAM)
- Reset
- Power Monitor
- Timer 2
- Programmable Counter Array PCA
- Serial I/O Port
- Interrupt System
- Power Management
- Keyboard Interface
- 2-wire Interface (TWI)
- Serial Port Interface (SPI)
- Hardware Watchdog Timer
- ONCE(TM) Mode (ON Chip Emulation)
- Power-off Flag
- EEPROM Data Memory
- Reduced EMI Mode
- Flash Memory
- Electrical Characteristics
- Absolute Maximum Ratings
- DC Parameters
- AC Parameters
- Explanation of the AC Symbols
- External Program Memory Characteristics
- External Program Memory Read Cycle
- External Data Memory Characteristics
- External Data Memory Write Cycle
- External Data Memory Read Cycle
- Serial Port Timing - Shift Register Mode
- Shift Register Timing Waveforms
- External Clock Drive Waveforms
- AC Testing Input/Output Waveforms
- Float Waveforms
- Clock Waveforms
- Ordering Information
- Packaging Information
- Table of Contents
iii
AT89C51ID2
4289C–8051–11/05
Flash Memory.................................................................................... 116
Features............................................................................................................ 116
Flash Programming and Erasure...................................................................... 116
Flash Registers and Memory Map.................................................................... 117
Flash Memory Status........................................................................................ 120
Memory Organization ....................................................................................... 120
Bootloader Architecture .................................................................................... 121
ISP Protocol Description................................................................................... 126
Functional Description ...................................................................................... 127
Flow Description ............................................................................................... 129
API Call Description.......................................................................................... 138
Electrical Characteristics................................................................. 140
Absolute Maximum Ratings.............................................................................. 140
DC Parameters................................................................................................. 140
AC Parameters ................................................................................................. 143
Ordering Information........................................................................ 151
Change Log for 4289A - 09/03 to 4289B - 12/03.............................................. 151
4289B - 12/03 to 4289C - 11/05 ....................................................................... 151
Packaging Information..................................................................... 152
PLCC44 ............................................................................................................ 152
VQFP44............................................................................................................ 153
Table of Contents .................................................................................. i