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DS90UB954-Q1: 953/954 GPIO control

Part Number: DS90UB954-Q1

Hi All,

I'd like to set up the related registers of 953/954 to control GPIO.

Image sensor/LED driver <-- GPIO0/1/2(953) <-- FPD-LINK III <-- GPIO0/1/2(954) <-- FSYNC/LED EN/LED PWM <-- ECU

The setting registers are as follows.

-------------------------------------------------------------------------------------------

953

Reg 0x0E : 0x70 // GPIO0/1/2 output enable

Reg 0x0D : 0x70 // Enable remote GPIO0/1/2

Reg 0x33 : 0x03 // FC GPIO enable, Four GPIOs

954

Reg 0x0F : 0x07 // GPIO0/1/2 input enable

Reg 0x59 : 0x03 // Datapath control 1, FC GPIO enable, Four GPIOs

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The input signals of GPIO0/1/2 on 954 are verified, but there are no output signals of GPIO0/1/2 on 953.

Are there the registers that have to be changed?

Regards,

Jeffrey