AT89LP51RB2 Atmel Corporation, AT89LP51RB2 Datasheet - Page 250

• Manufacturer Part Number: AT89LP51RB2
• Manufacturer: Atmel Corporation

Specifications of AT89LP51RB2

• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 42
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Adc Channels: 7
• Adc Resolution (bits): 10
• Adc Speed (ksps): 153.8
• Sram (kbytes): 1.375
• Self Program Memory: API
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 4
• Isp: SPI/OCD/UART
• Watchdog: Yes

Table of Contents (Continued)
ii
AT89LP51RB2/RC2/IC2 Preliminary
7
8
9
10 External Interrupts ................................................................................. 66
11 Keyboard Interface and General-purpose Interrupts .......................... 66
12 I/O Ports .................................................................................................. 69
13 Enhanced Timer 0 and Timer 1 with PWM ........................................... 77
Reset ....................................................................................................... 51
Power Saving Modes ............................................................................. 55
Interrupts ................................................................................................ 59
6.7
6.8
6.9
6.10
7.1
7.2
7.3
7.4
7.5
7.6
8.1
8.2
8.3
8.4
9.1
9.2
9.3
11.1
12.1
12.2
12.3
12.4
13.1
13.2
13.3
X1/X2 Feature .................................................................................................46
System Clock Prescaler ..................................................................................47
Peripheral Clocks ............................................................................................48
Timer Subclock (AT89L51IC2) ........................................................................50
Power-on Reset ...............................................................................................51
Brown-out Reset ..............................................................................................52
External Reset .................................................................................................53
Hardware Watchdog Reset .............................................................................54
PCA Watchdog Reset ......................................................................................54
Software Reset ................................................................................................54
Idle Mode .........................................................................................................55
Power-down Mode ...........................................................................................56
Reducing Power Consumption ........................................................................57
Low Power Configuration ................................................................................58
Interrupt Priority ...............................................................................................59
Interrupt Response ..........................................................................................61
Interrupt Registers ...........................................................................................63
Registers .........................................................................................................68
Port Configuration ............................................................................................69
Port Analog Functions .....................................................................................72
Port Read-Modify-Write ...................................................................................73
Port Alternate Functions ..................................................................................73
Registers .........................................................................................................78
Mode 0 – Variable Width Timer/Counter .........................................................80
Mode 1 – 16-bit Auto-Reload Timer/Counter ...................................................81
3722A–MICRO–10/11