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PIC16F877-20/P Arkusz danych(PDF) 13 Page - Microchip Technology

Numer części PIC16F877-20/P
Szczegółowy opis  28/40-pin 8-Bit CMOS FLASH Microcontrollers
PDF  218 Pages
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Producent  MICROCHIP [Microchip Technology]
Strona internetowa  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F877-20/P Arkusz danych(HTML) 13 Page - Microchip Technology

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 2001 Microchip Technology Inc.
DS30292C-page 11
PIC16F87X
2.0
MEMORY ORGANIZATION
There are three memory blocks in each of the
PIC16F87X MCUs. 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).
FIGURE 2-1:
PIC16F877/876 PROGRAM
MEMORY MAP AND
STACK
2.1
Program Memory Organization
The PIC16F87X devices 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 2-2:
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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