Datasheet

PIC16(L)F1507
DS41586A-page 85 Preliminary  2011 Microchip Technology Inc.
FIGURE 10-2: FLASH PROGRAM MEMORY READ CYCLE EXECUTION
EXAMPLE 10-1: FLASH PROGRAM MEMORY READ
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
BSF PMCON1,RD
executed here
INSTR(PC + 1)
executed here
PC PC + 1 PMADRH,PMADRL
PC+3
PC + 5
Flash ADDR
RD bit
PMDATH,PMDATL
PC + 3 PC + 4
INSTR (PC + 1)
INSTR(PC - 1)
executed here
INSTR(PC + 3)
executed here
INSTR(PC + 4)
executed here
Flash Data
PMDATH
PMDATL
Register
INSTR (PC) INSTR (PC + 3) INSTR (PC + 4)
instruction ignored
Forced NOP
INSTR(PC + 2)
executed here
instruction ignored
Forced NOP
* 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 PMADRL ; Select Bank for PMCON registers
MOVLW PROG_ADDR_LO ;
MOVWF PMADRL ; Store LSB of address
MOVLW PROG_ADDR_HI ;
MOVWF PMADRH ; Store MSB of address
BCF PMCON1,CFGS ; Do not select Configuration Space
BSF PMCON1,RD ; Initiate read
NOP ; Ignored (Figure 10-2)
NOP ; Ignored (Figure 10-2)
MOVF PMDATL,W ; Get LSB of word
MOVWF PROG_DATA_LO ; Store in user location
MOVF PMDATH,W ; Get MSB of word
MOVWF PROG_DATA_HI ; Store in user location