Datasheet

PIC18F6525/6621/8525/8621
DS39612C-page 272  2003-2013 Microchip Technology Inc.
FIGURE 24-4: TABLE WRITE (WRTn) DISALLOWED
FIGURE 24-5: EXTERNAL BLOCK TABLE READ (EBTRn) DISALLOWED
000000h
0007FFh
000800h
003FFFh
004000h
007FFFh
008000h
00BFFFh
00C000h
00FFFFh
WRTB,EBTRB = 11
WRT0,EBTR0 = 01
WRT1,EBTR1 = 11
WRT2,EBTR2 = 11
WRT3,EBTR3 = 11
TBLWT*
TBLPTR = 000FFFh
PC = 003FFEh
TBLWT*
PC = 008FFEh
Register Values Program Memory
Configuration Bit Settings
Results: All table writes disabled to Block n whenever WRTn = 0
.
WRTB,EBTRB = 11
WRT0,EBTR0 = 10
WRT1,EBTR1 = 11
WRT2,EBTR2 = 11
WRT3,EBTR3 = 11
TBLRD*
TBLPTR = 000FFFh
PC = 004FFEh
Results: All table reads from external blocks to Block n are disabled whenever EBTRn = 0.
TABLAT register returns a value of ‘0’.
Register Values Program Memory Configuration Bit Settings
0007FFh
000800h
003FFFh
004000h
007FFFh
008000h
00BFFFh
00C000h
00FFFFh
000000h