Other Parts Discussed in Thread: TEST
We found that the I/O ports active HIGH in default when PCA9555RGER is powered on at room temperature,
However，It will active LOW when it is powered on at high temperature +60-85 degrees for a period of time. What is the reason ，Why the Polarity is Inversion at different temperature ?
During the test, the MCU did not send any configuration command to PCA555 through I2C. I removed the I2C line and only validate the default status for PCA555 .