PIC17C7XX Datasheet, PDF (42/328 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM Microcontrollers with 10-bit A/D

PIC17C7XX
TABLE 7-1: MODE MEMORY ACCESS
Operating
Mode
Internal
Program
Memory
Microprocessor
Microcontroller
Extended
Microcontroller
Protected
Microcontroller
No Access
Access
Access
Access
Configuration Bits,
Test Memory,
Boot ROM
No Access
Access
No Access
Access
The PIC17C7XX can operate in modes where the pro-
gram memory is off-chip. They are the microprocessor
and extended microcontroller modes. The micropro-
cessor mode is the default for an unprogrammed
device.
Regardless of the processor mode, data memory is
always on-chip.
FIGURE 7-2: MEMORY MAP IN DIFFERENT MODES
0000h
Microprocessor
Mode
External
Program
Memory
PIC17C752/762
FFFFh
OFF-CHIP
ON-CHIP
2000h
Extended
Microcontroller
Mode
0000h
On-chip
Program
Memory
01FFFh
External
Program
Memory
FFFFh
OFF-CHIP
ON-CHIP
Microcontroller
Modes
0000h
01FFFh
2000h
On-chip
Program
Memory
FE00h Config. Bits
Test Memory
FFFFh Boot ROM
OFF-CHIP
ON-CHIP
00h
120h
00h
120h
00h
120h
0000h
External
Program
Memory
PIC17C756A/766
FFFFh
OFF-CHIP
FFh 1FFh
ON-CHIP
4000h
FFh 1FFh
ON-CHIP
0000h
3FFFh
On-chip
Program
Memory
FFh 1FFh
ON-CHIP
0000h
3FFFh
4000h
On-chip
Program
Memory
External
Program
Memory
ON-CHIP
FFFFh
OFF-CHIP
ON-CHIP
FE00h Config. Bits
Test Memory
FFFFh Boot ROM
OFF-CHIP
ON-CHIP
00h
120h 220h 320h
FFh 1FFh 2FFh 3FFh
ON-CHIP
00h
120h 220h 320h
FFh 1FFh 2FFh 3FFh
ON-CHIP
00h
120h 220h 320h
FFh 1FFh 2FFh 3FFh
ON-CHIP
DS30289A-page 42
© 1998 Microchip Technology Inc.