PIC18LF13K22 Microchip Technology, PIC18LF13K22 Datasheet - Page 20

• Manufacturer Part Number: PIC18LF13K22
• Description: (PIC18F1xK22) Flash Microcontrollers
• Manufacturer: Microchip Technology

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PIC18F1XK22/LF1XK22
4.4
The ID locations are programmed much like the code
memory. The ID registers are mapped in addresses
200000h through 200007h. These locations read out
normally even after code protection.
TABLE 4-8:
DS41357A-page 20
Step 1: Direct access to code memory.
0000
0000
0000
Step 2: Set Table Pointer to ID. Load write buffer with 8 bytes and write.
0000
0000
0000
0000
0000
0000
1101
1101
1101
1111
0000
Note:
Command
4-bit
ID Location Programming
The user only needs to fill the first 8 bytes
of the write buffer in order to write the ID
locations.
WRITE ID SEQUENCE
<MSB><LSB>
<MSB><LSB>
<MSB><LSB>
<MSB><LSB>
Data Payload
8E A6
9C A6
84 A6
0E 20
6E F8
0E 00
6E F7
0E 00
6E F6
00 00
BSF EECON1, EEPGD
BCF EECON1, CFGS
BSF EECON1, WREN
MOVLW 20h
MOVWF TBLPTRU
MOVLW 00h
MOVWF TBLPTRH
MOVLW 00h
MOVWF TBLPTRL
Write 2 bytes and post-increment address by 2.
Write 2 bytes and post-increment address by 2.
Write 2 bytes and post-increment address by 2.
Write 2 bytes and start programming.
NOP - hold PGC high for time P9 and low for time P10.
Advance Information
Table 4-8 demonstrates the code sequence required to
write the ID locations.
In order to modify the ID locations, refer to the method-
ology described in Section 4.2.1 “Modifying Code
Memory”. As with code memory, the ID locations must
be erased before being modified.
Core Instruction
© 2008 Microchip Technology Inc.