Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller PLCC 44 (16.59x16.59) 8-Bit 60 MHz I/O number 34

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Table Of Contents

Features
Description
Block Diagram
SFR Mapping
Pin Configurations
Oscillators
- Overview
- Registers
- Functional Block Diagram
- Operating Modes
  - Reset
  - Functional Modes
- Design Considerations
  - Oscillators Control
  - Prescaler Divider
- Timer 0: Clock Inputs
Enhanced Features
- X2 Feature
  - Description
Dual Data Pointer Register DPTR
Expanded RAM (XRAM)
- Registers
Reset
- Introduction
- Reset Input
- Reset Output
Power Monitor
- Description
Timer 2
- Auto-Reload Mode
- Programmable Clock- Output
- Registers
Programmable Counter Array PCA
- PCA Capture Mode
- 16-bit Software Timer/ Compare Mode
- High Speed Output Mode
- Pulse Width Modulator Mode
- PCA Watchdog Timer
Serial I/O Port
- Framing Error Detection
- Automatic Address Recognition
- Registers
- Baud Rate Selection for UART for Mode 1 and 3
  - Internal Baud Rate Generator (BRG)
- UART Registers
Interrupt System
- Registers
- Interrupt Sources and Vector Addresses
Power Management
- Introduction
- Idle Mode
  - Entering Idle Mode
  - Exiting Idle Mode
- Power-Down Mode
  - Entering Power-Down Mode
  - Exiting Power-Down Mode
- Registers
Keyboard Interface
- Interrupt
- Power Reduction Mode
- Registers
2-wire Interface (TWI)
- Description
- Notes
- Registers
Serial Port Interface (SPI)
- Features
- Signal Description
- Functional Description
Hardware Watchdog Timer
- Using the WDT
- WDT During Power Down and Idle
ONCE(TM) Mode (ON Chip Emulation)
Power-off Flag
EEPROM Data Memory
- Write Data
- Read Data
- Registers
Reduced EMI Mode
Flash Memory
- Features
- Flash Programming and Erasure
- Flash Registers and Memory Map
- Flash Memory Status
- Memory Organization
- Bootloader Architecture
- ISP Protocol Description
  - Physical Layer
  - Frame Description
- Functional Description
- Flow Description
- API Call Description
Electrical Characteristics
- Absolute Maximum Ratings
- DC Parameters
- AC Parameters
Ordering Information
- Change Log for 4289A - 09/03 to 4289B - 12/03
- 4289B - 12/03 to 4289C - 11/05
Packaging Information
- PLCC44
- VQFP44
Table of Contents

137

AT89C51ID2

4289C–8051–11/05

05h Read Function

00h

00h Manufacturer Id

01h Device Id #1

02h Device Id #2

03h Device Id #3

07h

00h Read SSB

01h Read BSB

02h Read SBV

06h Read Extra Byte

0Bh 00h Read Hardware Byte

0Eh

00h Read Device Boot ID1

01h Read Device Boot ID2

0Fh 00h Read Bootloader Version

07h Program EEPROM data

Program Nb EEProm Data Byte.

Bootloader will accept up to 128

(80h) data bytes.

Table 96. ISP Commands Summary (Continued)

Command Command Name data[0] data[1] Command Effect