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TCAN4550-Q1: Sleep Mode

Part Number: TCAN4550-Q1
Other Parts Discussed in Thread: TCAN4550

Hi,

I got an issue: when TCAN4550 goes into normal from standby, then it automatically goes into sleep. (They didn't send MO=00). And they read back h0820, there is no fault. 

The schematic is as below. Please help. Thanks.