18 FEB. 2023 - test using PE4312
Magic smoke, it worth the effort.
After a quick chat with Psemi, it become clear that I did not properly read datasheet. Digital input cannot exceed 3.6 V for 5V Vcc ! Shame on me
First light, I successfully addressed PE4312 via MCP23008.
PE4312 is quite a nice one, apart some small insertion attenuation easy to compensate, the ATT is quite precise !