PIC16F631/677/685/687/689/690
REGISTER 10-5: EECON1: EEPROM CONTROL REGISTER
R/W-x
EEPGD(1)
U-0
—
U-0
—
U-0
—
R/W-x
R/W-0
WREN
R/S-0
WR
R/S-0
RD
WRERR
bit 7
bit 0
Legend:
S = Bit can only be set
R = Readable bit
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
-n = Value at POR
bit 7
EEPGD: Program/Data EEPROM Select bit(1)
1= Accesses program memory
0= Accesses data memory
bit 6-4
bit 3
Unimplemented: Read as ‘0’
WRERR: EEPROM Error Flag bit
1= A write operation is prematurely terminated (any MCLR Reset, any WDT Reset during
normal operation or BOR Reset)
0= The write operation completed
bit 2
bit 1
WREN: EEPROM Write Enable bit
1= Allows write cycles
0= Inhibits write to the data EEPROM
WR: Write Control bit
EEPGD = 1:
This bit is ignored
EEPGD = 0:
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 data EEPROM is complete
bit 0
RD: Read Control bit
1= Initiates a memory read (the RD is cleared in hardware and can only be set, not cleared, in
software.)
0= Does not initiate a memory read
Note 1: PIC16F685/PIC16F689/PIC16F690 only.
© 2007 Microchip Technology Inc.
DS41262D-page 121
MICROCHIP [ MICROCHIP ]
