PIC16F872 Datasheet, PDF (30/160 Pages) Microchip Technology – 28-Pin, 8-Bit CMOS FLASH Microcontroller

PIC16F872
REGISTER 4-1: EECON1 REGISTER (ADDRESS 18Ch)
R/W-x U-0
U-0
U-0 R/W-x R/W-0 R/S-0 R/S-0
EEPGD —
—
— WRERR WREN WR
RD
R = Readable bit
bit7
bit0 ^{W = Writable bit}
U = Unimplemented bit,
read as ‘0’
- n= Value at POR reset
bit 7:
EEPGD: Program / Data EEPROM Select bit
1 = Accesses Program memory
0 = Accesses data memory
(This bit cannot be changed while a read or write operation is in progress)
bit 6-4: Unimplemented: Read as '0'
bit 3:
WRERR: EEPROM Error Flag bit
1 = A write operation is prematurely terminated
(any MCLR reset or any WDT reset during normal operation)
0 = The write operation completed
bit 2:
WREN: EEPROM Write Enable bit
1 = Allows write cycles
0 = Inhibits write to the EEPROM
bit 1:
WR: Write Control bit
1 = initiates a write cycle. (The bit is cleared by hardware once write is complete.) The WR bit can only
be set (not cleared) in software.
0 = Write cycle to the EEPROM is complete
bit 0:
RD: Read Control bit
1 = Initiates an EEPROM read RD is cleared in hardware. The RD bit can only be set (not cleared) in
software.
0 = Does not initiate an EEPROM read
DS30221A-page 30
Preliminary
© 1999 Microchip Technology Inc.