Tool/software:
The schematic above is the expected effect I want to achieve, but the following is the result I tested out.
asms_1, wd_0. reset flashing
asms_1, wd_ floating (there is a 5v pull-up here). reset flashing
asms_1, wd_ square wave. reset always on
asms_0, wd_ high impedance state. reset always on
Why doesn't it output a low level, and the flickering of the output level is between 3V and 0V.