
PIC18FXX39
DS30485A-page 202
Preliminary
2002 Microchip Technology Inc.
REGISTER 20-11: DEVID1: DEVICE ID REGISTER 1 FOR PIC18FXX39 (BYTE ADDRESS 3FFFFEh)
REGISTER 20-12: DEVID2: DEVICE ID REGISTER 2 FOR PIC18FXX39 (BYTEADDRESS 3FFFFFh)
RR
DEV2
DEV1
DEV0
REV4
REV3
REV2
REV1
REV0
bit 7
bit 0
bit 7-5
DEV2:DEV0: Device ID bits
000
= PIC18F2539
001
= PIC18F4539
100
= PIC18F2439
101
= PIC18F4439
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
RR
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 DEV2:DEV0 bits in the Device ID Register 1 to identify the
part number.
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
- n = Value when device is unprogrammed
u = Unchanged from programmed state