Regular Member
Joined: 14/10/2018
Location: United StatesPosts: 86
| Posted: 05:41pm 09 May 2025 |
kinda. but with different pinout and no shenanigans like adjustable core voltage
- Flash on board, psram optional with control on GP47. I want to retain GP0 so i can do parallel data writes without having to shift up 1 bit due to GP0 being occupied by PSRam_CE
- all gpio brought out
- usb switchable from connector to pins using solderbridges. maybe i will ditch even this. if i can find a longer usb connector.
- boot switch next to usb ( side activated). The idea is to put this at the edge of a carrier board and have the usb connector come out of the case. Tiny hole in the case to fit paperclip so you can poke the boot switch to throw the cpu into DFU
- optional vref generator (lm4040). you can feed VREF or pull from it if the LM4040 is installed.
- detachable Heartbeat led (solder bridge)
- esd protection on USB
- detachable 3v3 with solder bridge. for small applications that are usb powered you strap it and it becomes bus powered. if you unstrap it you need to provide your own 3v3
i want it as raw as possible.