USB DFU Bootloader Access on the STM32F042G6U6

[terryg_phitek]

On the STM32F042G6U6 the USB DP and DM lines have to be MUXed onto pins 19 and 20 by way of the PA11_ PA12_ RMP bit in the SYSCFG_CFGR1 register.

I would like to use the USB DFU mode of the device. So will the USB DFU work (i.e MUX the DP and DM lines) when the device is in bootloader mode?

[Geoffrey1]

I've done this with the TSSOP20 package and it works as you would hope -- when powered up with an empty flash or reset with the boot0 pin pulled high it goes into DFU USB mode. I haven't tried the other packages (yet).

[terryg_phitek]

Thank you for checking that. If the F6Px does that then it bodes very well for the G6Ux then.

Of course the dev kit is the K6Tx so I couldn't tell using that.

We will be getting boards done before the end of year so hopefully I will have a firm answer for us all by then.