DS90C189-Q1: LCD is not working ,Do need software request or other reasons?

Hello,

Can you please share the panel specification and the schematic for the DS90C189-Q1 circuit?

Best Regards,

Casey 

LCD =   VL-PS-COG-T800F312P-L3

LCD RGB pins is going to MCU RGB pins.

We look forward to your immediate return,please.

Hello,

First, can you confirm the measured PCLK value from the RGB input to the device and the output PCLK coming from the device? Or are there no signals at all coming out on the output side from the DS90C189-Q1?

Best Regards,

Casey 

Hi,

PCLK signal is coming form RGB, but there is no signal from output of device DS90C189-Q1?

We are using jumper now in circuit, maybe signal can not coming, because it is lvds signal,can it be?

And do need power sequence senario this device, we did not this senario, we will do when PCB would come. Is my circuit true?

Hi,

I would like to confirm a few configurations.

I see that PDB pin on the circuit is pulled down and controlled by the microcontroller.

1. Could you confirm this pin is pulled to high by the controller?

2. What is the supplied PCLK?

Since your PDB pin is controlled by microcontroller, you should be able to configure the power sequencing following datasheet section 10.1

Best Regards,

Charley Cai