Hi Team,
My customer is using ISO7220M, and they meet a weird issue. The output of ISO7220 is always high regardless of the input is high or low, can you help suggest why this issue comes from? Below is their test conditions.
1. Test 1: Connect input to left side GND, and read ISO output with FPGA, but always read out high.
2.Test 2: Disable isolation by connecting two side GND together, then use FPGA GPIO_1 give ISO7220 input, and read ISO7220 output to FPGA GPIO_2. However, the output of ISO7220 is always high regardless of the input is high or low
Thank you!
Best regards
Yunjing