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PIC16F876ATI/ML Datasheet(PDF) 17 Page - Microchip Technology

Part # PIC16F876ATI/ML
Description  28/40-pin Enhanced FLASH Microcontrollers
PDF  234 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F876ATI/ML Datasheet(HTML) 17 Page - Microchip Technology

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 2003 Microchip Technology Inc.
DS39582B-page 15
PIC16F87XA
2.0
MEMORY ORGANIZATION
There are three memory blocks in each of the
PIC16F87XA devices. 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 3.0
“Data EEPROM and Flash Program Memory”.
Additional information on device memory may be found
in the PICmicro® Mid-Range MCU Family Reference
Manual (DS33023).
FIGURE 2-1:
PIC16F876A/877A
PROGRAM MEMORY MAP
AND STACK
2.1
Program Memory Organization
The PIC16F87XA devices have a 13-bit program
counter capable of addressing an 8K word x 14 bit
program
memory
space.
The
PIC16F876A/877A
devices have 8K words x 14 bits of Flash program
memory,
while
PIC16F873A/874A
devices
have
4K words x 14 bits. 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:
PIC16F873A/874A
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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