george_leon
Junior Member level 3
;*********************************
; atmel fusebit doctor
;************************************
;this is program to reset atmel fusebits to enable serial programming
;use 4 mhz crystal in pic16f72
;load the atmega fusebit doctor hex file in pic16f72
;apply +5v to vcc & avcc and +12v to reset of atmega and +5v to pic simultaneously
;and wait until led at portb,0 of pic blinks, power off and take as fresh atmel ic
;**** connection details ***********
; atmega8 pic16f72
; pin1 ------- +12 v
; pin2 ------- open
; pin3 ------- open (optional rdy/bsy led)
; pin4 ------- +5 v
; pin5 ------- portc,1
; pin6 ------- portc,2
; pin7 ------- +5 v
; pin8 ------- gnd
; pin9 ------- portc,3
; pin10 ------ open
; pin11 ------ portc,4
; pin12 ------ portc,5
; pin13 ------ gnd
; pin14 ------ portc,0
; pin15 ------ gnd
; pin16 ------ gnd
; pin17 ------ gnd
; pin18 ------ gnd
; pin19 ------ gnd
; pin20 ------ +5v
; pin21 ------ open
; pin22 ------ gnd
; pin23 ------ portc,6
; pin24 ------ portc,7
; pin25 ------ gnd
; pin26 ------ open
; pin27 ------ open
; pin28 ------ open
; atmel fusebit doctor
;************************************
;this is program to reset atmel fusebits to enable serial programming
;use 4 mhz crystal in pic16f72
;load the atmega fusebit doctor hex file in pic16f72
;apply +5v to vcc & avcc and +12v to reset of atmega and +5v to pic simultaneously
;and wait until led at portb,0 of pic blinks, power off and take as fresh atmel ic
;**** connection details ***********
; atmega8 pic16f72
; pin1 ------- +12 v
; pin2 ------- open
; pin3 ------- open (optional rdy/bsy led)
; pin4 ------- +5 v
; pin5 ------- portc,1
; pin6 ------- portc,2
; pin7 ------- +5 v
; pin8 ------- gnd
; pin9 ------- portc,3
; pin10 ------ open
; pin11 ------ portc,4
; pin12 ------ portc,5
; pin13 ------ gnd
; pin14 ------ portc,0
; pin15 ------ gnd
; pin16 ------ gnd
; pin17 ------ gnd
; pin18 ------ gnd
; pin19 ------ gnd
; pin20 ------ +5v
; pin21 ------ open
; pin22 ------ gnd
; pin23 ------ portc,6
; pin24 ------ portc,7
; pin25 ------ gnd
; pin26 ------ open
; pin27 ------ open
; pin28 ------ open