Part Number:PCA9555
Dear,
Our customer have two problems when using PCA9555, please help to analyze:
1. They use PCA9555 to scan keypad, after several restarting ( restarting the whole system instead of PCA9555 and initializing PCA9555 every time ), keypad scanning will be false. The schematic as follows.
2. The standby-current consumption is 1 uA max in datasheet, but the current they tested actually is about 470 uA. So what configuration should we do to reduce the current ?
I will appreciate that if you rely to me, thank you !