AT89C51RD2 Atmel Corporation, AT89C51RD2 Datasheet - Page 134

• Manufacturer Part Number: AT89C51RD2
• Manufacturer: Atmel Corporation

Specifications of AT89C51RD2

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Uart: 1
• Sram (kbytes): 2
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Isp: UART
• Watchdog: Yes

4235K–8051–05/08
1
2
3
4
5
6
7
8
9
10 Reset ....................................................................................................... 26
11 Power Monitor ........................................................................................ 28
12 Timer 2 .................................................................................................... 30
13 Programmable Counter Array (PCA) .................................................... 35
Features .................................................................................................... 1
Description ............................................................................................... 2
Block Diagram .......................................................................................... 3
SFR Mapping ............................................................................................ 4
Pin Configurations ................................................................................... 9
Port Types .............................................................................................. 14
Oscillator ................................................................................................ 15
Enhanced Features ................................................................................ 17
Dual Data Pointer Register (DPTR) ...................................................... 21
Expanded RAM (XRAM) ......................................................................... 23
6.1
6.2
7.1
9.1
10.1
10.2
10.3
11.1
12.1
12.2
12.3
13.1
13.2
13.3
13.4
13.5
Registers .........................................................................................................15
Functional Block Diagram ................................................................................16
X2 Feature .......................................................................................................17
Registers .........................................................................................................24
Introduction ......................................................................................................26
Reset Input ......................................................................................................26
Reset Output ...................................................................................................26
Description .......................................................................................................28
Auto-reload Mode ............................................................................................30
Programmable Clock-output ............................................................................31
Registers .........................................................................................................32
PCA Capture Mode .........................................................................................43
16-bit Software Timer/ Compare Mode ...........................................................43
High Speed Output Mode ................................................................................44
Pulse Width Modulator Mode ..........................................................................45
PCA Watchdog Timer ......................................................................................46
AT89C51RD2/ED2
135