A simple programmer for eproms from 27C64 to 27C512
Orgler electronic
"Applications with microcontroller HC11"


PROMSCH1.GIF


The 68HC11 is in BOOTSTRAP-MODE.
PORTB is the output for the addresses and data.
PORTC reads the data from eprom. 



 

PROMSCH2.GIF




PORTA generates two PWM-signal for programming voltages.






 

PROMALG.GIF




This is the programming algorithmus.