AT89C51RE2 Atmel Corporation, AT89C51RE2 Datasheet - Page 186

• Manufacturer Part Number: AT89C51RE2
• Manufacturer: Atmel Corporation

Specifications of AT89C51RE2

• Flash (kbytes): 128 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 34
• Spi: 1
• Uart: 2
• Sram (kbytes): 8.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Isp: UART/OCD
• Watchdog: Yes

3
AT89C51RE2
2-wire Interface (TWI) ....................................................................... 131
Serial Port Interface (SPI) ................................................................ 149
Power Monitor ................................................................................... 161
Power-off Flag ................................................................................... 163
Reset .................................................................................................. 164
Electrical Characteristics ................................................................. 166
Ordering Information ........................................................................ 178
Packaging Information ..................................................................... 179
Document Revision History ............................................................. 183
Description........................................................................................................ 133
Notes ................................................................................................................ 136
Registers........................................................................................................... 146
Features............................................................................................................ 149
Signal Description............................................................................................. 149
Functional Description ...................................................................................... 151
Description........................................................................................................ 161
Introduction ....................................................................................................... 164
Reset Input ....................................................................................................... 164
Reset Output .....................................................................................................165
Absolute Maximum Ratings ..............................................................................166
DC Parameters .................................................................................................166
AC Parameters ................................................................................................. 168
PLCC44 ............................................................................................................ 179
VQFP44 ............................................................................................................ 181
Changes from 7663B to 7663C ........................................................................ 183
Changes from 7663C to 7663D ........................................................................ 183
Changes from 7663D to 7663E ........................................................................ 183
7663E–8051–10/08