Other Parts Discussed in Thread: TCA9539, TCA8418E, TCA8418
Hi!
1. when device power on, the INTB is low. When hardware reset is done by pin3, the INTB becomes high. is this normal behavior? is there timing rule for power up?
2. tried to change the input edge polarity for interrupt by register. however it was not applied. I sent the command to 0x74 device address, and 0x01 data to 0x04 register. is this correct way to set?