AT89LP51ED2-20MU Atmel, AT89LP51ED2-20MU Datasheet - Page 250

• Manufacturer Part Number: AT89LP51ED2-20MU
• Description: 8-bit Microcontrollers - MCU 64KB 20MHz 2.4V-5.5V
• Manufacturer: Atmel

Specifications of AT89LP51ED2-20MU

• Rohs: yes
• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 20 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 256 B
• On-chip Adc: Yes
• Operating Supply Voltage: 2.4 V to 5.5 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: VQFN-44
• Mounting Style: SMD/SMT
• Data Rom Size: 4 KB
• Interface Type: 2-Wire, SPI, UART
• Number Of Programmable I/os: 36
• Number Of Timers: 3
• Processor Series: AT89x
• Program Memory Type: Flash
• Factory Pack Quantity: 360

Table of Contents (Continued)
ii
AT89LP51RD2/ED2/ID2 Preliminary
7
8
9
10 External Interrupts ................................................................................. 68
11 Keyboard Interface and General-purpose Interrupts .......................... 68
12 I/O Ports .................................................................................................. 71
13 Enhanced Timer 0 and Timer 1 with PWM ........................................... 79
Reset ....................................................................................................... 53
Power Saving Modes ............................................................................. 57
Interrupts ................................................................................................ 61
6.6
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
Dual Oscillator Support (AT89LP51ID2) ..........................................................46
X1/X2 Feature .................................................................................................48
System Clock Prescaler ..................................................................................49
Peripheral Clocks ............................................................................................50
Timer Subclock (AT89L51ID2) ........................................................................52
Power-on Reset ...............................................................................................53
Brown-out Reset ..............................................................................................54
External Reset .................................................................................................55
Hardware Watchdog Reset .............................................................................56
PCA Watchdog Reset ......................................................................................56
Software Reset ................................................................................................56
Idle Mode .........................................................................................................57
Power-down Mode ...........................................................................................58
Reducing Power Consumption ........................................................................59
Low Power Configuration ................................................................................60
Interrupt Priority ...............................................................................................61
Interrupt Response ..........................................................................................63
Interrupt Registers ...........................................................................................65
Registers .........................................................................................................70
Port Configuration ............................................................................................71
Port Analog Functions .....................................................................................74
Port Read-Modify-Write ...................................................................................75
Port Alternate Functions ..................................................................................75
Registers .........................................................................................................80
Mode 0 – Variable Width Timer/Counter .........................................................82
3714A–MICRO–7/11