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PIC18F242-E/SP 用户编程技术手册 - Microchip（微芯）
制造商:
Microchip（微芯）
分类:
微控制器
封装:
SPDIP-28
描述:
PIC18 系列 768 B RAM 16 kB 闪存 8位 增强型 微控制器 - SDIP-28
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PIC18F242-E/SP数据手册
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PIC18FXX2/XX8
DS39576C-page 4 2010 Microchip Technology Inc.
Users may store identification information (ID) in eight
ID registers. These ID registers are mapped in
addresses 200000h through 200007h. The ID locations
read out normally, even after code protection is applied.
Locations 300001h through 30000Dh are reserved for
the configuration bits. These bits may be set to select
various device options, and are described in
Section 5.0. These configuration bits read out normally
even after code protected.
Locations 3FFFFEh and 3FFFFFh are reserved for the
device ID bits. These bits may be used by the program-
mer to identify what device type is being programmed,
and are described in Section 5.0. These configuration
bits read out normally even after code protection.
2.3.1 MEMORY ADDRESS POINTER
Memory in the address space 000000h to 3FFFFFh is
addressed via the Table Pointer, which is comprised of
three pointer registers:
• TBLPTRU, at address 0FF8h
• TBLPTRH, at address 0FF7h
• TBLPTRL, at address 0FF6h
The 4-bit command, ‘0000’ (Core Instruction), is used
to load the Table Pointer prior to using many Read or
Write operations.
FIGURE 2-3: CONFIGURATION AND ID LOCATIONS FOR PIC18FXX2/XX8 DEVICES
TBLPTRU TBLPTRH TBLPTRL
Addr[21:16] Addr[15:8] Addr[7:0]
ID Location 1 200000h
ID Location 2 200001h
ID Location 3 200002h
ID Location 4 200003h
ID Location 5 200004h
ID Location 6 200005h
ID Location 7 200006h
ID Location 8 200007h
CONFIG1L 300000h
CONFIG1H 300001h
CONFIG2L 300002h
CONFIG2H 300003h
CONFIG3L 300004h
CONFIG3H 300005h
CONFIG4L 300006h
CONFIG4H 300007h
CONFIG5L 300008h
CONFIG5H 300009h
CONFIG6L 30000Ah
CONFIG6H 30000Bh
CONFIG7L 30000Ch
CONFIG7H 30000Dh
Device ID1 3FFFFEh
Device ID2 3FFFFFh
Note: Sizes of memory areas are not to scale.
000000h
1FFFFFh
3FFFFFh
01FFFFh
Code Memory
Unimplemented
Read as ‘0’
Configuration
and ID
Space
2FFFFFh
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