AT89C51RB2-RLTCM ATMEL [ATMEL Corporation], AT89C51RB2-RLTCM Datasheet - Page 123

• Manufacturer Part Number: AT89C51RB2-RLTCM
• Description: 8-bit Microcontroller with 16K/ 32K Bytes Flash
• Manufacturer: ATMEL [ATMEL Corporation]

4180B–8051–04/03
Interrupt System ................................................................................. 53
Keyboard Interface ............................................................................. 62
Serial Port Interface (SPI) ................................................................... 66
Hardware Watchdog Timer ................................................................ 75
ONCE
Power Management ............................................................................ 78
Power-off Flag ..................................................................................... 82
Reduced EMI Mode ............................................................................. 83
Flash EEPROM Memory ..................................................................... 84
Electrical Characteristics ................................................................. 105
UART Registers.................................................................................................. 48
Registers............................................................................................................. 54
Interrupt Sources and Vector Addresses............................................................ 61
Registers............................................................................................................. 63
Features.............................................................................................................. 66
Signal Description............................................................................................... 66
Functional Description ........................................................................................ 68
Using the WDT ................................................................................................... 75
WDT During Power-down and Idle ..................................................................... 76
Reset .................................................................................................................. 78
Reset Recommendation to Prevent Flash Corruption ........................................ 80
Idle Mode ............................................................................................................ 80
Power-down Mode.............................................................................................. 80
Features.............................................................................................................. 84
Flash Programming and Erasure........................................................................ 84
Flash Registers and Memory Map...................................................................... 85
Flash Memory Status.......................................................................................... 88
Memory Organization ......................................................................................... 88
Bootloader Architecture ...................................................................................... 89
ISP Protocol Description..................................................................................... 93
Functional Description ........................................................................................ 94
Flow Description ................................................................................................. 95
API Call Description.......................................................................................... 103
Absolute Maximum Ratings ..............................................................................105
DC Parameters for Standard Voltage ............................................................... 105
DC Parameters for Low Voltage ....................................................................... 107
™
Mode (ON Chip Emulation) .................................................. 77
ii