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Microchip Technology DM164134 Data Sheet

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© 2006 Microchip Technology Inc.
DS41159E-page 271
PIC18FXX8
REGISTER 24-11: DEVID1: DEVICE ID REGISTER 1 FOR PIC18FXX8 DEVICES 
(BYTE ADDRESS 3FFFFEh)                
REGISTER 24-12: DEVID2: DEVICE ID REGISTER 2 FOR PIC18FXX8 DEVICES 
(BYTE ADDRESS 3FFFFFh)                
R
R
R
R
R
R
R
R
DEV2
DEV1
DEV0
REV4
REV3
REV2
REV1
REV0
bit 7
bit 0
bit 7-5
DEV2:DEV0: Device ID bits
These bits are used with the DEV<10:3> bits in the Device ID Register 2 to identify the 
part number.
000
 = PIC18F248
001
 = PIC18F448
010
 = PIC18F258
011
 = PIC18F458
bit 4-0
REV4:REV0: Revision ID bits
These bits are used to indicate the device revision.
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value when device is unprogrammed
u = Unchanged from programmed state
R
R
R
R
R
R
R
R
DEV10
DEV9
DEV8
DEV7
DEV6
DEV5
DEV4
DEV3
bit 7
bit 0
bit 7-0
DEV10:DEV3: Device ID bits
These bits are used with the DEV<2:0> bits in the Device ID Register 1 to identify the 
part number.
00001000
 = PIC18FXX8
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value when device is unprogrammed
u = Unchanged from programmed state