DS90UB948-Q1: GPIO function in pattern mode

Hi James,

I want to see the GPIO configuration. Can you get the register dump for 947 and 948? Thanks.

Aaron

hi  Aaron,

Pls check the GPIO setting as below, I'll get the DUMP register later.

Thanks.

First 947 then 948, then enable internal pattern mode.

 //947

static U16 suhwSerAddr[] = {0x003,0x017,0x007,0x008,0x00F,0x0C6,0x0C7,0x013};

static U8 subSerValue[]  = {0xDA, 0x9E, 0x96, 0x44, 0x03, 0x21, 0x01, 0x60};

//948

static U16 suhwDesAddr[] = {0x01D,0x01E,0x01F,0x020,0x026,0x027};

static U8 subDesValue[]  = {0x09, 0x99, 0x05, 0x09, 0x16, 0x16};、

Hi James,

Are you trying to enable patgen from 948 or 947? If you are enabling on the 947 side, you do not need to do anything on the 948 except the strap mode.

Aaron

Hi Aaron,

They're enabling the patgen(internal clk+internal timing) from 948, and they write the register through local I2C bus from display side MCU.

Do you have any advice for this?

Thanks.

Hi James,

Thank you for the confirmation. Let me try to understand your setup. So, you are trying to get a patgen from 948 to display and monitor the GPIO on 948 or 947. Can you provide me your schematic for 947 and 948?

Aaron

Hi Aaron,

As mentioned, customer is trying to get the patgen from 948 and found the GPIO of 948 behavior different, even the GPIO is set as local output as above code setting.

I'll share the schematic via email for NDA reason.

Thanks.

Hi James,

Since you reached out to me offline, I will temporary closed this.

Aaron