PIC18LF4523T-I/SO データシートの表示（PDF） - Microchip Technology

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PIC18LF4523T-I/SO

28/40/44-Pin, Enhanced Flash Microcontrollers with 12-Bit A/D and nanoWatt Technology

Microchip Technology 

PIC18F2423/2523/4423/4523

3.0 SPECIAL FEATURES OF THE

CPU

Note:

For additional details on the Configuration

bits, refer to Section 23.1 “Configuration

Bits” in the “PIC18F2420/2520/4420/4520

Data Sheet” (DS39631). Device ID informa-

tion presented in this section is for the

PIC18F2423/2523/4423/4523 devices only.

3.1 Device ID Registers

The Device ID registers are read-only registers. They

identify the device type and revision for device pro-

grammers and can be read by firmware using table

reads.

TABLE 3-1: DEVICE IDs

File Name

Bit 7 Bit 6 Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

3FFFFEh DEVID1(1)

3FFFFFh DEVID2(1)

DEV3 DEV2

DEV11 DEV10

DEV1

DEV9

DEV0

DEV8

REV3

DEV7

REV2

DEV6

REV1

DEV5

REV0

DEV4

Legend:

Note 1:

2:

x = unknown, u = unchanged, — = unimplemented. Shaded cells are unimplemented, read as ‘0’.

DEVID registers are read-only and cannot be programmed by the user.

See Register 3-1 and Register 3-2 for DEVID1 and DEVID2 values.

Default/

Unprogrammed

Value

xxxx xxxx(2)

xxxx xxxx(2)

REGISTER 3-1: DEVID1: DEVICE ID REGISTER 1 FOR PIC18F2423/2523/4423/4523

R

DEV3

bit 7

R

DEV2

R

DEV1

R

DEV0

R

REV3

R

REV2

R

REV1

Legend:

R = Read-only bit

P = Programmable bit

-n = Value when device is unprogrammed

U = Unimplemented bit, read as ‘0’

u = Unchanged from programmed state

bit 7-4

bit 3-0

DEV<3:0>: Device ID bits

1101 = PIC18F4423

1001 = PIC18F4523

0101 = PIC18F2423

0001 = PIC18F2523

REV<3:0>: Revision ID bits

These bits are used to indicate the device revision.

R

REV0

bit 0

© 2009 Microchip Technology Inc.

DS39755C-page 35

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