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PIC16F87X Datasheet(PDF) 11 Page - Microchip Technology

Part # PIC16F87X
Description  28/40-pin 8-Bit CMOS FLASH Microcontrollers
PDF  200 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F87X Datasheet(HTML) 11 Page - Microchip Technology

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PIC16F87X
© 1998 Microchip Technology Inc.
Preliminary
DS30292A-page 11
2.0
MEMORY ORGANIZATION
There are three memory blocks in each of these PIC-
micros. The Program Memory and Data Memory have
separate buses so that concurrent access can occur
and is detailed in this section. The EEPROM data
memory block is detailed in Section 4.0.
Additional information on device memory may be found
in the PICmicro
™ Mid-Range Reference Manual,
(DS33023).
2.1
Program Memory Organization
The PIC16F87X PICmicros have a 13-bit program
counter capable of addressing an 8K x 14 program
memory space. The PIC16F877/876 devices have 8K
x 14 words of FLASH program memory and the
PIC16F873/874 devices have 4K x 14. Accessing a
location above the physically implemented address will
cause a wraparound.
The reset vector is at 0000h and the interrupt vector is
at 0004h.
FIGURE 2-1:
PIC16F877/876 PROGRAM
MEMORY MAP AND STACK
FIGURE 2-2:
PIC16F874/873 PROGRAM
MEMORY MAP AND STACK
PC<12:0>
13
0000h
0004h
0005h
Stack Level 1
Stack Level 8
Reset Vector
Interrupt Vector
On-chip
CALL, RETURN
RETFIE, RETLW
1FFFh
Stack Level 2
Program
Memory
Page 0
Page 1
Page 2
Page 3
07FFh
0800h
0FFFh
1000h
17FFh
1800h
PC<12:0>
13
0000h
0004h
0005h
Stack Level 1
Stack Level 8
Reset Vector
Interrupt Vector
On-chip
CALL, RETURN
RETFIE, RETLW
1FFFh
Stack Level 2
Program
Memory
Page 0
Page 1
07FFh
0800h
0FFFh
1000h



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