Datasheet

 2010 Microchip Technology Inc. DS39616D-page 273
PIC18F2331/2431/4331/4431
REGISTER 23-13: DEVID1: DEVICE ID REGISTER 1 FOR PIC18F2331/2431/4331/4431 DEVICES
RRRRRRRR
DEV2 DEV1 DEV0 REV4 REV3 REV2 REV1 REV0
bit 7 bit 0
Legend:
R = Readable bit P = Programmable bit U = Unimplemented bit, read as ‘0’
-n = Value when device is unprogrammed U = Unchanged from programmed state
bit 7-5 DEV<2:0>: 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 = PIC18F4331
001 = PIC18F4431
100 = PIC18F2331
101 = PIC18F2431
bit 4-0 REV<4:0>: Revision ID bits
These bits are used to indicate the device revision.
REGISTER 23-14: DEVID2: DEVICE ID REGISTER 2 FOR PIC18F2331/2431/4331/4431 DEVICES
RRRRRRRR
DEV10
(1)
DEV9
(1)
DEV8
(1)
DEV7
(1)
DEV6
(1)
DEV5
(1)
DEV4
(1)
DEV3
(1)
bit 7 bit 0
Legend:
R = Readable bit P = Programmable bit U = Unimplemented bit, read as ‘0’
-n = Value when device is unprogrammed U = Unchanged from programmed state
bit 7-0 DEV<10:3>: Device ID bits
(1)
These bits are used with the DEV<2:0> bits in the Device ID Register 1 to identify the
part number
0000 0101 = PIC18F2331/2431/4331/4431 devices
Note 1: These values for DEV<10:3> may be shared with other devices. The specific device is always identified by
using the entire DEV<10:0> bit sequence.