PIC16F1459-ESSQTP datasheet(25/418 Pages) MICROCHIP

Part #	PIC16F1459-ESSQTP

Description	14/20-Pin Flash, 8-Bit USB Microcontrollers with XLP Technology

PDF	418 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

Logo

25 / 418 page

 2012 Microchip Technology Inc.

Preliminary

DS41639A-page 25

PIC16(L)F1454/5/9

3.1.1.2

Indirect Read with FSR

The program memory can be accessed as data by set-

ting bit 7 of the FSRxH register and reading the match-

ing INDFx register. The MOVIW instruction will place the

lower eight bits of the addressed word in the W register.

Writes to the program memory cannot be performed via

the INDF registers. Instructions that access the pro-

gram memory via the FSR require one extra instruction

cycle to complete. Example 3-2 demonstrates access-

ing the program memory via an FSR.

The High directive will set bit<7> if a label points to a

location in program memory.

EXAMPLE 3-2:

ACCESSING PROGRAM

MEMORY VIA FSR

constants

RETLW DATA0

;Index0 data

RETLW DATA1

;Index1 data

RETLW DATA2

RETLW DATA3

my_function

;… LOTS OF CODE…

MOVLW

LOW constants

MOVWF

FSR1L

MOVLW

HIGH constants

MOVWF

FSR1H

MOVIW

0[FSR1]

;THE PROGRAM MEMORY IS IN W

PIC16F1459-ESSQTP Datasheet(PDF) 25 Page - Microchip Technology