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PIC17C75X Datasheet, PDF (40/320 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM Microcontrollers | |||
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PIC17C75X
TABLE 7-1: MODE MEMORY ACCESS
Operating
Mode
Internal
Program
Memory
Microprocessor
Microcontroller
Extended
Microcontroller
Protected
Microcontroller
No Access
Access
Access
Access
Conï¬guration Bits,
Test Memory,
Boot ROM
No Access
Access
No Access
Access
The PIC17C75X 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
PIC17C752
0000h
Microprocessor
Mode
External
Program
Memory
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 Conï¬g. Bits
Test Memory
FFFFh Boot ROM
OFF-CHIP
ON-CHIP
00h
120h
00h
120h
00h
120h
PIC17C756
0000h
External
Program
Memory
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 Conï¬g. 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
DS30264A-page 40
Preliminary
© 1997 Microchip Technology Inc.
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