PIC16C58B-04/SO データシートの表示（PDF） - Microchip Technology
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PIC16C58B-04/SO Datasheet PDF : 192 Pages
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6.0 MEMORY ORGANIZATION
PIC16C5X memory is organized into program memory
and data memory. For devices with more than 512
bytes of program memory, a paging scheme is used.
Program memory pages are accessed using one or two
STATUS Register bits. For devices with a data memory
register file of more than 32 registers, a banking
scheme is used. Data memory banks are accessed
using the File Selection Register (FSR).
6.1 Program Memory Organization
The PIC16C54, PIC16CR54 and PIC16C55 have a 9-
bit Program Counter (PC) capable of addressing a 512
x 12 program memory space (Figure 6-1). The
PIC16C56 and PIC16CR56 have a 10-bit Program
Counter (PC) capable of addressing a 1K x 12 program
memory space (Figure 6-2). The PIC16CR57,
PIC16C58 and PIC16CR58 have an 11-bit Program
Counter capable of addressing a 2K x 12 program
memory space (Figure 6-3). Accessing a location
above the physically implemented address will cause a
wraparound.
A NOP at the RESET vector location will cause a restart
at location 000h. The RESET vector for the PIC16C54,
PIC16CR54 and PIC16C55 is at 1FFh. The RESET
vector for the PIC16C56 and PIC16CR56 is at 3FFh.
The RESET vector for the PIC16C57, PIC16CR57,
PIC16C58, and PIC16CR58 is at 7FFh. See
Section 6.5 for additional information using CALL and
GOTO instructions.
FIGURE 6-1:
PIC16C54/CR54/C55
PROGRAM MEMORY MAP
AND STACK
PC<8:0>
CALL, RETLW
9
Stack Level 1
Stack Level 2
000h
On-chip
Program
Memory
0FFh
100h
RESET Vector
1FFh
PIC16C5X
FIGURE 6-2:
PIC16C56/CR56
PROGRAM MEMORY MAP
AND STACK
CALL, RETLW
PC<9:0>
10
Stack Level 1
Stack Level 2
On-chip Program
Memory (Page 0)
On-chip Program
Memory (Page 1)
000h
0FFh
100h
1FFh
200h
2FFh
300h
RESET Vector
3FFh
FIGURE 6-3:
PIC16C57/CR57/C58/
CR58 PROGRAM
MEMORY MAP AND
STACK
PC<10:0>
11
CALL, RETLW
Stack Level 1
Stack Level 2
On-chip Program
Memory (Page 0)
On-chip Program
Memory (Page 1)
On-chip Program
Memory (Page 2)
On-chip Program
Memory (Page 3)
RESET Vector
000h
0FFh
100h
1FFh
200h
2FFh
300h
3FFh
400h
4FFh
500h
5FFh
600h
6FFh
700h
7FFh
1997-2013 Microchip Technology Inc.
Preliminary
DS30453E-page 25
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