AT89C51RE2 Atmel Corporation, AT89C51RE2 Datasheet - Page 37

• 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

FCON Register
7663E–8051–10/08
Table 23. FCON Register
FCON Register (S:D1h)
Flash Control Register
Reset Value= 0000 0000b
Bit Number
FPL3
7-4
2-0
7
3
Mnemonic
FMOD2:0
FPL3:0
FPL2
FPS
Bit
6
Description
Programming Launch Command Bits
Write 5Xh followed by AXh to launch the programming according to FMOD2:0. (see
Table 26.)
Flash Map Program Space
When this bit is set:
The MOVX @DPTR, A instruction writes in the columns latches space
When this bit is cleared:
The MOVX @DPTR, A instruction writes in the regular XDATA memory space
Flash Mode
These bits allow to select the target memory area and operation on FM0
See Table 25.
FPL1
5
FPL0
4
FPS
3
FMOD2
2
AT89C51RE2
FMOD1
1
FMOD0
0
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