is this for that board you mentioned a little while ago with a more-memory-heavy STM32 paired with an on-board ESP8266
Yes, it's still very early days, but I'm working on a PCB now.
please take into consideration the serving of pin CH_PD by one output pin
Yes, absolutely.
4K7 pull-up
I doubt you really want this... When pulled down by the MCU it's using almost 1mA (3.3v / 4700 = 0.7mA) to fight against it :)
@tve is there any reason for the resistor on GPIO15? I'm just trying to reduce component count :)
Also, can CH_PD really act as reset? So I could just connect reset to 3.3v, and then use CH_PD with GPOI0 low to put the board into bootloader mode? It'd be nice to save an IO pin :)
Switching regulator is a nice idea - any idea what the quiescent current of that one is? I'd like to keep the battery life as high as possible.
P.S. I'm thinking of ditching the Battery + USB switchover FET. Just seems like extra trouble and I'm not sure anyone really uses it.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Thanks for all the info!
Yes, it's still very early days, but I'm working on a PCB now.
Yes, absolutely.
I doubt you really want this... When pulled down by the MCU it's using almost 1mA (3.3v / 4700 = 0.7mA) to fight against it :)
@tve is there any reason for the resistor on GPIO15? I'm just trying to reduce component count :)
Also, can CH_PD really act as reset? So I could just connect reset to 3.3v, and then use CH_PD with GPOI0 low to put the board into bootloader mode? It'd be nice to save an IO pin :)
Switching regulator is a nice idea - any idea what the quiescent current of that one is? I'd like to keep the battery life as high as possible.
P.S. I'm thinking of ditching the Battery + USB switchover FET. Just seems like extra trouble and I'm not sure anyone really uses it.