Hi,
I would like to ask if there is a possibility to program a RL78 family microcontroller (R5F100) without any Renesas programmer? Using some diy programmer or another housing method?
Thanks in advance.
Marcin
Yes that's what I really intended to say. FT232RL + some 74series buffer would work.
What those diodes are intended to do? Only for data routing or powering also?
I could prepare some schematisc and PCB also.
I use it with the FT232, no issue, made an "adaptor" to connect my board to the 14 positions cable used on Renesas kits.
The circuit is the mode 1, I don't use the DTR diode, just a 1N4148 on the TX: