Datasheet

 2003-2013 Microchip Technology Inc. DS39612C-page 41
PIC18F6525/6621/8525/8621
REGISTER 4-1: CONFIG3L: CONFIGURATION REGISTER 3 LOW
FIGURE 4-3: MEMORY MAPS FOR PIC18F6525/6621/8525/8621 PROGRAM MEMORY MODES
R/P-1 U-0 U-0 U-0 U-0 U-0 R/P-1 R/P-1
WAIT — — — — —PM1PM0
bit 7 bit 0
bit 7 WAIT: External Bus Data Wait Enable bit
1 = Wait selections unavailable, device will not wait
0 = Wait programmed by WAIT1 and WAIT0 bits of MEMCOM register (MEMCOM<5:4>)
bit 6-2 Unimplemented: Read as ‘0’
bit 1-0 PM1:PM0: Processor Data Memory Mode Select bits
11 = Microcontroller mode
10 = Microprocessor mode
(1)
01 = Microcontroller with Boot Block mode
(1)
00 = Extended Microcontroller mode
(1)
Note 1: This mode is available only on PIC18F8525/8621 devices.
Legend:
R = Readable bit P = Programmable bit U = Unimplemented bit, read as ‘0’
-n = Value after erase ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
Microprocessor
Mode
(3)
000000h
1FFFFFh
External
Program
Memory
External
Program
Memory
1FFFFFh
000000h
On-Chip
Program
Memory
Extended
Microcontroller
Mode
(3)
Microcontroller
Mode
000000h
External
On-Chip
Program Space Execution
On-Chip
Program
Memory
1FFFFFh
Reads
000800h
1FFFFFh
0007FFh
Microprocessor
with Boot Block
Mode
(3)
000000h
On-Chip
Program
Memory
External
Program
Memory
Memory Flash
On-Chip
Program
Memory
(No
access)
‘0’s
010000h
(2)
00FFFFh
(2)
External
On-Chip
Memory Flash
On-Chip
Flash
External
On-Chip
Memory Flash
00BFFFh
(1)
00C000h
(1)
00FFFFh
(2)
00BFFFh
(1)
010000h
(2)
00C000h
(1)
Note 1: PIC18F8525 and PIC18F6525.
2: PIC18F8621 and PIC18F6621.
3: This mode is available only on PIC18F8525/8621 devices.