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PIC16LF876A-I Datasheet, PDF (15/234 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers
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 PIC® Mid-Range MCU Family Reference Manual
(DS33023).
FIGURE 2-1:
PIC16F876A/877A
PROGRAM MEMORY MAP
AND STACK
PC<12:0>
CALL, RETURN
13
RETFIE, RETLW
Stack Level 1
Stack Level 2
Stack Level 8
Reset Vector
0000h
On-Chip
Program
Memory
Interrupt Vector
Page 0
Page 1
Page 2
Page 3
0004h
0005h
07FFh
0800h
0FFFh
1000h
17FFh
1800h
1FFFh
PIC16F87XA
2.1 Program Memory Organization
The PIC16F87XA devices have a 13-bit program coun-
ter 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>
CALL, RETURN
13
RETFIE, RETLW
Stack Level 1
Stack Level 2
Stack Level 8
Reset Vector
0000h
On-Chip
Program
Memory
Interrupt Vector
Page 0
Page 1
0004h
0005h
07FFh
0800h
0FFFh
1000h
1FFFh
 2001-2013 Microchip Technology Inc.
DS39582C-page 15