AT89C51IC2-SLSCM datasheet(144/146 Pages) ATMEL

144 / 146 page

AT89C51IC2

4301A–8051–01/04

Power Management ............................................................................ 67

Reset .................................................................................................................. 67

Reset Recommendation to Prevent Flash Corruption ........................................ 69

Idle Mode ............................................................................................................ 69

Power-down Mode.............................................................................................. 69

Serial Port Interface (SPI) ................................................................... 71

Features.............................................................................................................. 71

Signal Description............................................................................................... 71

Functional Description ........................................................................................ 73

Keyboard Interface ............................................................................. 80

Registers............................................................................................................. 81

2-wire Interface (TWI) ......................................................................... 84

Description.......................................................................................................... 86

Notes .................................................................................................................. 89

Registers............................................................................................................. 99

Hardware Watchdog Timer .............................................................. 102

Using the WDT ................................................................................................. 102

WDT During Power Down and Idle................................................................... 103

Power-off Flag ................................................................................... 104

ONCE(TM) Mode (ON Chip Emulation) ........................................... 105

Reduced EMI Mode ........................................................................... 106

Flash EEPROM Memory ................................................................... 107

Features............................................................................................................ 107

Flash Programming and Erasure...................................................................... 107

Flash Registers and Memory Map.................................................................... 108

Flash Memory Status........................................................................................ 111

Memory Organization ....................................................................................... 111

Bootloader Architecture .................................................................................... 112

ISP Protocol Description................................................................................... 116

Functional Description ...................................................................................... 117

Flow Description ............................................................................................... 118

API Call Description.......................................................................................... 126

Electrical Characteristics ................................................................. 128

Absolute Maximum Ratings ..............................................................................128

DC Parameters for Standard Voltage ............................................................... 128

DC Parameters for Low Voltage ....................................................................... 130

AC Parameters ................................................................................................. 132

AT89C51IC2-SLSCM Datasheet(PDF) 144 Page - ATMEL Corporation