Thank you for answering. Regards
Il giorno ven 3 apr 2015 17:39 Stefan Tauner < [email protected]> ha scritto: > On Mon, 30 Mar 2015 15:56:06 +0000 > Riccardo Delpopolo Carciopolo <[email protected]> wrote: > > > Hi, > > I've used flashrom with pickit2 in past. > > I'm a newbie but I'd like to add support for this MCUs by myself. > > On Internet exist some parallel programmer but I want to program a 78k0s > > flash my with the uart protocol. > > We're can I start from? > > It requires some vpp pulses to enable the uart programming mode. > > I don't think that flashrom is the right tool for the job of writing > the flash memory of a microcontroller. Usually there are dedicated tools > for this... but I guess the 78k0s are not really popular? You can of > course use flashrom or at least its serial.c as a base for your tool. > > The protocol seems to be documented in a public application note: > http://documentation.renesas.com/doc/DocumentServer/U17739EJ3V0AN00.pdf > > I am not sure about pulses thing. AFAICT the flash mode is enabled if > FLMD0 is high when reset is released. I am however unsure if the > following pulses on the same pin (FLMD0) are to be output by the > programmer or are a way for the chip to indicate how it needs to be > accessed... the language in the AN is abysmal. I would apply VCC to > FLMD0 on reset release with a pull-up resistor and measure if the chip > outputs anything on the port... > > Anyway this is rather off-topic... good luck with your project! > -- > Kind regards/Mit freundlichen Grüßen, Stefan Tauner >
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