Datasheet

 2010-2012 Microchip Technology Inc. DS41419D-page 117
PIC16(L)F1824/1828
11.6 Write Verify
Depending on the application, good programming
practice may dictate that the value written to the data
EEPROM or program memory should be verified (see
Example 11-6) to the desired value to be written.
Example 11-6 shows how to verify a write to EEPROM.
EXAMPLE 11-6: EEPROM WRITE VERIFY
BANKSEL EEDATL ;
MOVF EEDATL, W ;EEDATL not changed
;from previous write
BSF EECON1, RD ;YES, Read the
;value written
XORWF EEDATL, W ;
BTFSS STATUS, Z ;Is data the same
GOTO WRITE_ERR ;No, handle error
: ;Yes, continue