PIC16F688
REGISTER 9-1:
EEDAT – EEPROM DATA REGISTER (ADDRESS: 9Ah)
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
EEDAT7
EEDAT6
EEDAT5
EEDAT4
EEDAT3
EEDAT2
EEDAT1
EEDAT0
bit 7
bit 0
bit 7-0
EEDATn: Byte Value to Write to or Read From Data EEPROM bits
Legend:
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
REGISTER 9-2:
EEADR – EEPROM ADDRESS REGISTER (ADDRESS: 9Bh)
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
EEADR0
bit 0
EEADR7
EEADR6
EEADR5
EEADR4
EEADR3
EEADR2 EEADR1
bit 7
bit 7-0
EEADR: Specifies One of 256 Locations for EEPROM Read/Write Operation bits
Legend:
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
REGISTER 9-3:
EECON1 – EEPROM CONTROL REGISTER 1 (ADDRESS: 9Ch)
R/W-0
U-0
—
U-0
—
U-0
—
R/W-x
R/W-0
WREN
R/S-0
WR
R/S-0
RD
EEPGD
WRERR
bit 7
bit 0
bit 7
EEPGD: Program/Data EEPROM Select bit
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 BOD detect)
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 an memory read (Read takes one cycle. RD is cleared in hardware. The RD bit can only be
set, not cleared, in software.)
0= Does not initiate an memory read
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
DS41203B-page 72
Preliminary
2004 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
