pic 16f88

[RobertD]

You have two values to compare for each individuals.
One being the pin number, the other being the thumb data. The pin number has to match the thumb data.

 

[RobertD]

Data Read
BANKSEL EEADR ; Select Bank of EEADR
MOVF ADDR, W ;
MOVWF EEADR ; Data Memory Address
; to read
BANKSEL EECON1 ; Select Bank of EECON1
BCF EECON1, EEPGD; Point to Data memory
BSF EECON1, RD ; EE Read
BANKSEL EEDATA ; Select Bank of EEDATA
MOVF EEDATA, W ; W = EEDATA

Data Write:

BANKSEL EECON1 ; Select Bank of
; EECON1
BTFSC EECON1, WR ; Wait for write
GOTO $-1 ; to complete
BANKSEL EEADR ; Select Bank of
; EEADR
MOVF ADDR, W ;
MOVWF EEADR ; Data Memory
; Address to write
MOVF VALUE, W ;
MOVWF EEDATA ; Data Memory Value
; to write
BANKSEL EECON1 ; Select Bank of
; EECON1
BCF EECON1, EEPGD ; Point to DATA
; memory
BSF EECON1, WREN ; Enable writes
BCF INTCON, GIE ; Disable INTs.
MOVLW 55h ;
MOVWF EECON2 ; Write 55h
MOVLW AAh ;
MOVWF EECON2 ; Write AAh
BSF EECON1, WR ; Set WR bit to
; begin write
BSF INTCON, GIE ; Enable INTs.
BCF EECON1, WREN ; Disable writes

It's on the data sheet.