PIC16F690T View Datasheet(PDF) - Microchip Technology

Part Name

Description

MFG CO.

PIC16F690T

20-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

Microchip Technology 

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PIC16F631/677/685/687/689/690

2.0 MEMORY ORGANIZATION

2.1 Program Memory Organization

The PIC16F631/677/685/687/689/690 has a 13-bit

program counter capable of addressing an 8K x 14

program memory space. Only the first 1K x 14

(0000h-03FFh) is physically implemented for the

PIC16F631, the first 2K x 14 (0000h-07FFh) for the

PIC16F677/PIC16F687, and the first 4K x 14

(0000h-0FFFh) for the PIC16F685/PIC16F689/

PIC16F690. Accessing a location above these

boundaries will cause a wraparound. The Reset vector

is at 0000h and the interrupt vector is at 0004h (see

Figures 2-1 through 2-3).

FIGURE 2-1:

PROGRAM MEMORY MAP

AND STACK FOR THE

PIC16F631

PC<12:0>

CALL, RETURN

13

RETFIE, RETLW

Stack Level 1

Stack Level 2

Stack Level 8

Reset Vector

Interrupt Vector

On-chip Program

Memory

Access 0-3FFh

0000h

0004h

0005h

03FFh

0400h

1FFFh

FIGURE 2-2:

PROGRAM MEMORY MAP

AND STACK FOR THE

PIC16F685/689/690

PC<12:0>

CALL, RETURN

13

RETFIE, RETLW

Stack Level 1

Stack Level 2

Stack Level 8

Reset Vector

Interrupt Vector

On-chip Program

Memory

Access 0-FFFh

0000h

0004h

0005h

0FFFh

1000h

1FFFh

© 2006 Microchip Technology Inc.

Preliminary

DS41262C-page 25

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