AT89C51RB2 Atmel Corporation, AT89C51RB2 Datasheet - Page 124

• Manufacturer Part Number: AT89C51RB2
• Manufacturer: Atmel Corporation

Specifications of AT89C51RB2

• Flash (kbytes): 16 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Uart: 1
• Sram (kbytes): 1.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Isp: UART
• Watchdog: Yes

Table of Contents
Features ................................................................................................. 1
Description ............................................................................................ 1
Block Diagram ....................................................................................... 3
SFR Mapping ......................................................................................... 4
Pin Configurations ................................................................................ 9
Port Types ........................................................................................... 13
Oscillator ............................................................................................. 14
Enhanced Features ............................................................................. 16
Dual Data Pointer Register (DPTR) ................................................... 20
Expanded RAM (XRAM) ...................................................................... 23
Timer 2 ................................................................................................. 26
Programmable Counter Array (PCA) ................................................. 31
Serial I/O Port ...................................................................................... 44
Registers ............................................................................................................ 14
Functional Block Diagram .................................................................................. 15
X2 Feature.......................................................................................................... 16
Registers ............................................................................................................ 25
Auto-reload Mode ............................................................................................... 26
Programmable Clock-out Mode.......................................................................... 27
Registers ............................................................................................................ 29
Registers ............................................................................................................ 33
PCA Capture Mode ............................................................................................ 39
16-bit Software Timer/ Compare Mode .............................................................. 40
High-speed Output Mode ................................................................................... 41
Pulse Width Modulator Mode ............................................................................. 42
PCA Watchdog Timer......................................................................................... 42
Framing Error Detection ..................................................................................... 44
Automatic Address Recognition ......................................................................... 45
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