AT89C51RE2 Atmel Corporation, AT89C51RE2 Datasheet - Page 160
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AT89C51RE2
Manufacturer Part Number
AT89C51RE2
Description
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
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160
AT89C51RE2
SPCON, SPSTA and SPDAT registers may be read and written at any time while there is no on-
going exchange. However, special care should be taken when writing to them while a transmis-
sion is on-going:
•
•
•
•
•
Do not change SPR2, SPR1 and SPR0
Do not change CPHA and CPOL
Do not change MSTR
Clearing SPEN would immediately disable the peripheral
Writing to the SPDAT will cause an overflow.
7663E–8051–10/08