AT89LP51 Atmel Corporation, AT89LP51 Datasheet - Page 113

• Manufacturer Part Number: AT89LP51
• Manufacturer: Atmel Corporation

Specifications of AT89LP51

• Flash (kbytes): 4 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 36
• Uart: 1
• Sram (kbytes): 0.25
• Eeprom (bytes): 256
• Self Program Memory: IAP
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 3
• Isp: SPI
• Watchdog: Yes

Table of Contents
3709D–MICRO–12/11
1
2
3
4
5
6
7
Features ..................................................................................................... 1
Pin Configurations ................................................................................... 2
Overview ................................................................................................... 6
Memory Organization ............................................................................ 11
Special Function Registers ................................................................... 24
Enhanced CPU ....................................................................................... 25
System Clock ......................................................................................... 29
Reset ....................................................................................................... 32
.................................................................................................................... 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
5.1
5.2
5.3
6.1
6.2
6.3
6.4
7.1
7.2
7.3
7.4
40-lead PDIP .....................................................................................................2
44-lead TQFP ....................................................................................................2
44-lead PLCC ....................................................................................................3
44-pad VQFN/QFN/MLF ....................................................................................3
Pin Description ..................................................................................................4
Block Diagram ...................................................................................................7
System Configuration ........................................................................................7
Comparison to AT89S51/52 ..............................................................................8
Program Memory .............................................................................................11
Internal Data Memory ......................................................................................14
External Data Memory .....................................................................................14
In-Application Programming (IAP) ...................................................................23
Fast Mode ........................................................................................................25
Compatibility Mode ..........................................................................................26
Enhanced Dual Data Pointers .........................................................................26
Crystal Oscillator .............................................................................................29
External Clock Source .....................................................................................30
Internal RC Oscillator ......................................................................................30
System Clock Divider ......................................................................................31
Power-on Reset ...............................................................................................32
Brown-out Reset ..............................................................................................33
External Reset .................................................................................................33
Watchdog Reset ..............................................................................................34
AT89LP51/52
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