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DS90UH947-Q1: How to configure D-GPIO ?

Part Number: DS90UH947-Q1

Hi 

We are using DS90UH947 to connect to DS90UH948 

We would like to use D-GPIO2 to receive I/O status from DS90UH948 D-GPIO2 

Below is our register writing sequence, would you help review if any missing ?

1. DS90UH948  write 0x43 0x03    /948 set high speed 4-gpios mode

2.  DS90UH948 write 0x34 0x02   / 948 PORT1_SEL

3. DS90UH948 write 0x1e 0x10  / 948 set GPIO2  output mode

4. DS90UH947 write 0x1e 0x02  / 947 PORT1_SEL

5. DS90UH947 write 0xe 0x50    / 947 set GPIO2  Remote-hold-mode