fratello
Newbie level 6
Hi everyone ! First, I apologize for my poor english. Hope I explain right my problem.
I need to programming some Microwire EEPROM (93C56). So I build one programmer on serial port ; with PonyProg works great ! But...I intend to use one notebook, with USB only ! I buy one convertor USB to serial, based on PROLIFIC 2303; I build the schematic based on 74HCT244. But...I have no result ! I used once, from somebody, one "adaptor" based on CD4069 (? I am not sure...) with external power (another USB port) and my adaptor work OK, even the time it's a little long... Have somebody something like this building ? Do You have some suggestion about how "interfacing" this USB2Serial converter for programming those eeproms ? Thank in advance for every reply !
I need to programming some Microwire EEPROM (93C56). So I build one programmer on serial port ; with PonyProg works great ! But...I intend to use one notebook, with USB only ! I buy one convertor USB to serial, based on PROLIFIC 2303; I build the schematic based on 74HCT244. But...I have no result ! I used once, from somebody, one "adaptor" based on CD4069 (? I am not sure...) with external power (another USB port) and my adaptor work OK, even the time it's a little long... Have somebody something like this building ? Do You have some suggestion about how "interfacing" this USB2Serial converter for programming those eeproms ? Thank in advance for every reply !