CH32F030F3P6, what is it?

[jnk0le]

I'm repairing off grid inverter from a power bank (ap-ss-009, module is labelled as "CH/AP 6SLi-P2000W V2.1")
and after removing blown IGBTs and gate drivers, I'm left with this micro that has a dead short on at least 2 inputs from photocouplers.
consumes ~75mA from 5V, so maybe it can be still cloned.

There is one on low voltage side and one on HV side.
labelled as CH32F030F3P6





no manufacturer logo
tssop-20
5V supply

Power pinout is of course incompatible with stm32f030 but matches exactly ch32v003 (NRST + SWDIO on prog header)

Typographically closest ones are no match.
cs32f030 - "CHipsea", but only f6p6, stm pinout
hc32f030 - doesn't exist in this package
hk32f030 - no vcap use, swdio/swclk not routed to prog header
ch32v003 - this device is too old for that chip

Any ideas?

[DavidAlfa]

https://github.com/qqq5127/CH32F030

[jnk0le]

all files in this repo are named "hc32"

[jnk0le]

tried to query LV one by SWIM, SWD and wch 1/2 wire "SWD" - no effect

Must be something very exotic or level 2 locked.

[DavidAlfa]

Not really, you can simply disable or repurpose the SWD pins in the app, so the only way would me to play holding reset while connecting and releasing it just in time.
If there's a local oscillator your might have luck shorting it so the CPU executes nothing.