PIC16F1936T-ESS View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F1936T-ESS

28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt XLP™ Technology

Microchip Technology 

PIC16F193X/LF193X

EXAMPLE 23-4: FLASH PROGRAM MEMORY READ

* This code block will read 1 word of program

* memory at the memory address:

PROG_ADDR_HI : PROG_ADDR_LO

* data will be returned in the variables;

* PROG_DATA_HI, PROG_DATA_LO

BANKSEL

MOVLW

MOVWF

MOVLW

MOVWL

EEADRL

PROG_ADDR_LO

EEADRL

PROG_ADDR_HI

EEADRH

; Select Bank for EEPROM registers

;

; Store LSB of address

;

; Store MSB of address

BCF

EECON1,CFGS

; Select Configuration Space

BSF

EECON1,EEPGD

; Select Program Memory

BCF

INTCON,GIE

; Disable interrupts

BSF

EECON1,RD

; Initiate read

NOP

; Executed (Figure 23-1)

NOP

; Ignored (Figure 23-1)

BSF

INTCON,GIE

; Restore interrupts

MOVF

MOVWF

MOVF

MOVWF

EEDATL,W

PROG_DATA_LO

EEDATH,W

PROG_DATA_HI

; Get LSB of word

; Store in user location

; Get MSB of word

; Store in user location

FIGURE 23-1:

FLASH PROGRAM MEMORY READ CYCLE EXECUTION

Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

Flash ADDR

Flash Data

PC

PC + 1

EEADRH,EEADRL

PPCC++33

PC + 4

PC + 5

INSTR (PC)

INSTR (PC + 1) EEDATH,EEDATL INSTR (PC + 3) INSTR (PC + 4)

INSTR(PC - 1)

executed here

BSF EECON1,RD

executed here

INSTR(PC + 1)

executed here

Forced NOP

executed here

INSTR(PC + 3)

executed here

INSTR(PC + 4)

executed here

RD bit

EEDATH

EEDATL

Register

EERHLT

© 2009 Microchip Technology Inc.

Preliminary

DS41364B-page 327

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