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DS90UB948-Q1: Asking for the recommendation on DS90UB948/949 setting

Part Number: DS90UB948-Q1

Hi Team,

Customer is designing DS90UB948/949. And would you please help for the following questions.

Q1. Will 948/949 detect and determine the input source format and LCD panel are match or not? Then, the LCD can normal display under the 948 MODE_SEL0 set to corresponding proper setting.

Q2. For case 2, do customer need to adjust 948/949 output resolution?

 

Here are the experiment on customer’s board. 

case 1. Customer used HDMU pattern generator to generate the signal that matching the LCD panel spec as below.

Customer need to set MODE_SEL0 to1.241V

LCD panel can display normal.

Case 2. Customer used Notebook(1366 X 768) and android phone(un-known resolution) to output the HDMI signal

customer need to set ODE_SEL0 to 2.642V or 3.3V

LCD panel can be partial display normal.

In case 2, the display resolution is not correct form the LCD panel. 

Here are the original Notebook and Android phone content on notebook and phone.

However, after 949 to 948, the content showed on LCD panel are as below.

For notebook case, the content width is becoming wider. For the phone, it the scale on length and width are not as same as phone content.

Here are the block diagram, schematic and LCD panel spec.

txn.box.com/.../yxzhj85v2kllno1uudo50f9ytdhg4v34

BR,

SHH