AT89LP51ED2-20AU Atmel, AT89LP51ED2-20AU Datasheet - Page 249

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

Specifications of AT89LP51ED2-20AU

• Rohs: yes
• Core: 8051
• Processor Series: AT89x
• 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: TQFP-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
• Program Memory Type: Flash
• Factory Pack Quantity: 160

Table of Contents
3714A–MICRO–7/11
1
2
3
4
5
6
Features ..................................................................................................... 1
Pin Configurations ................................................................................... 2
Overview ................................................................................................... 6
Memory Organization ............................................................................ 13
Special Function Registers ................................................................... 27
Enhanced CPU ....................................................................................... 33
System Clock ......................................................................................... 43
.................................................................................................................... 3
1.1
1.2
1.3
1.4
1.5
2.1
2.2
2.3
3.1
3.2
3.3
3.4
3.5
3.6
5.1
5.2
5.3
5.4
5.5
6.1
6.2
6.3
6.4
6.5
44-lead VQFP ....................................................................................................2
44-lead PLCC ....................................................................................................2
44-pad VQFN/QFN/MLF ....................................................................................3
40-pin PDIP .......................................................................................................3
Pin Description ..................................................................................................4
Block Diagram ...................................................................................................8
System Configuration ........................................................................................8
Comparison to the Atmel AT89C51RD2/ED2/ID2 ...........................................10
Program Memory .............................................................................................13
Internal Data Memory ......................................................................................16
External Data Memory .....................................................................................17
Extra RAM (EDATA) ........................................................................................22
EEPROM .........................................................................................................22
Extended Stack ...............................................................................................26
Fast Mode ........................................................................................................33
Compatibility Mode ..........................................................................................34
Multiply–Accumulate Unit (MAC) .....................................................................34
Enhanced Dual Data Pointers .........................................................................37
Instruction Set Extensions ...............................................................................41
Crystal Oscillator A ..........................................................................................44
External Clock Source A ..................................................................................45
Internal RC Oscillator ......................................................................................45
Crystal Oscillator B (AT89LP51ID2) ................................................................45
External Clock Source B (AT89LP51ID2) ........................................................46
AT89LP51RD2/ED2/ID2 Preliminary
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