AT89C51RE2 Atmel Corporation, AT89C51RE2 Datasheet - Page 185

• Manufacturer Part Number: AT89C51RE2
• Manufacturer: Atmel Corporation

Specifications of AT89C51RE2

• Flash (kbytes): 128 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 34
• Spi: 1
• Uart: 2
• Sram (kbytes): 8.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Isp: UART/OCD
• Watchdog: Yes

7663E–8051–10/08
Timer 2 ................................................................................................. 77
Programmable Counter Array PCA ................................................... 82
Serial I/O Port ...................................................................................... 94
Interrupt System ............................................................................... 109
Power Management .......................................................................... 118
Oscillator ........................................................................................... 122
Hardware Watchdog Timer .............................................................. 124
Reduced EMI Mode ........................................................................... 126
Keyboard Interface ........................................................................... 127
Interrupt .............................................................................................................. 71
Registers............................................................................................................. 73
Auto-Reload Mode.............................................................................................. 77
Programmable Clock-Output .............................................................................. 78
Registers............................................................................................................. 80
PCA Capture Mode............................................................................................. 90
16-bit Software Timer/ Compare Mode............................................................... 90
High Speed Output Mode ................................................................................... 91
Pulse Width Modulator Mode.............................................................................. 92
PCA Watchdog Timer ......................................................................................... 93
Framing Error Detection ..................................................................................... 94
Automatic Address Recognition.......................................................................... 95
Registers............................................................................................................. 97
Baud Rate Selection for UART 0 for Mode 1 and 3............................................ 98
Baud Rate Selection for UART 1 for Mode 1 and 3............................................ 99
UART Registers................................................................................................ 103
Registers........................................................................................................... 110
Interrupt Sources and Vector Addresses.......................................................... 117
Introduction ....................................................................................................... 118
Idle Mode .......................................................................................................... 118
Power-Down Mode ........................................................................................... 118
Registers........................................................................................................... 121
Registers........................................................................................................... 122
Functional Block Diagram .................................................................................123
Using the WDT ................................................................................................. 124
WDT During Power Down and Idle................................................................... 125
Registers........................................................................................................... 128
AT89C51RE2
2