PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 69
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PIC18F258
Manufacturer Part Number
PIC18F258
Description
High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F258.pdf
(384 pages)
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- Current page: 69 of 384
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REGISTER 6-1:
2002 Microchip Technology Inc.
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
EECON1 REGISTER
EEPGD: FLASH Program or Data EEPROM Memory Select bit
1 = Access program FLASH memory
0 = Access data EEPROM memory
CFGS: FLASH Program/Data EE or Configuration Select bit
1 = Access configuration registers
0 = Access program FLASH or data EEPROM memory
Unimplemented: Read as '0'
FREE: FLASH Row Erase Enable bit
1 = Erase the program memory row addressed by TBLPTR on the next WR command
0 = Perform write only
WRERR: Write Error Flag bit
1 = A write operation is prematurely terminated
0 = The write operation completed
Note:
WREN: Write Enable bit
1 = Allows write cycles
0 = Inhibits write to the EEPROM or FLASH memory
WR: Write Control bit
1 = Initiates a data EEPROM erase/write cycle or a program memory erase cycle or write cycle.
0 = Write cycle to the EEPROM is complete
RD: Read Control bit
1 = Initiates an EEPROM read
0 = Does not initiate an EEPROM read
bit 7
Legend:
R = Readable bit
- n = Value at POR
EEPGD
R/W-x
(cleared by completion of erase operation)
(any MCLR or any WDT Reset during self-timed programming in normal operation)
(The operation is self timed and the bit is cleared by hardware once write is complete. The
WR bit can only be set (not cleared) in software.)
(Read takes one cycle. RD is cleared in hardware. The RD bit can only be set (not cleared)
in software. RD bit cannot be set when EEPGD = 1.)
When a WRERR occurs, the EEPGD and CFGS bits are not cleared. This allows
tracing of the error condition.
R/W-x
CFGS
U-0
Preliminary
—
W = Writable bit
’1’ = Bit is set
R/W-0
FREE
WRERR
R/W-x
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
WREN
R/W-0
PIC18FXX8
x = Bit is unknown
R/S-0
WR
DS41159B-page 67
R/S-0
RD
bit 0
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