Dear sonix Thank you for very useful explanation. I implement this circuit and program my 93LC66B EEPROM successfully. Kind regards.
Forum: PonyProg

Dear sonix, May you explain "Data output (from PC to a serial device) is realized through Tx, RTS, DTR lines and as a data input (from a serial device to PC) is used only CTS line." in more details? How SI Prog do read transaction using only CTS line?? tnx
Forum: PonyProg

Thank you sonix.
Forum: PonyProg

Dear sonix Thank you for your prompt reply. I would like to know how the base board circuit works (from electronic point of view). As I read in technical documents, in DB9 serial port, pin 2 and 3 are TXD and RXD and they are used for send and receive data. But in base board circuit they have different function. In this circuit, pin 2 has not connected to any where, and pin 3 has connected to
Forum: PonyProg

Dear sonix, I am going to use the circuit shown in below link for programming 93LCxx series EEPROM device. http://www.lancos.com/e2p/si-prog-v2_2.pdf So I kindly want to ask you to analysis this circuit operation (Base Board + Microwire 93xx adapter). tnx.
Forum: PonyProg