DS90UB928Q-Q1: Does DS90UB928Q support 1280*800 24bit color 60P TFT- LCD? does it support transfer I2C and Backlight control, reset,interrupt signal from TFT to host?

user5803783

Prodigy 60 points

Part Number: DS90UB928Q-Q1
Other Parts Discussed in Thread: DS90UB928Q

Hi, dear sir

Does DS90UB928Q support 1280*800 24bit color 60P TFT- LCD?

does it support transfer I2C and Backlight control, reset,interrupt signal from TFT to host? as the picture shows.

over 5 years ago

0 Casey McCrea over 5 years ago

TI__Guru** 103215 points

Hello,

Thanks for reaching out! Yes, 928 can meet all these requirements. For the backlight control just make sure you consult the data sheets for 929 and 928 to ensure the frequency and pulse width requirements can be met.

Best Regards,

Casey

0 user5803783 over 5 years ago in reply to Casey McCrea

Prodigy 60 points

Hi,Casey

Thank you for your reply. I still have 3 question about back chanel control.

1) Does "the frequency and pulse width " means the min pulse width of PWM pass though by 929-928 should be the period of in_clk?

2) Does the backlight PWM signal and Touch Panel reset signal should use GPIO 0-3 (BCC GPIO) of 929 and 938, instead of using the register access only GPIO?

3) Should I use the INTB_IN of 928 and REM_INTB of 929 to pass though the interrupt signal from TP to host?

Best regards!

0 Casey McCrea over 5 years ago in reply to user5803783

TI__Guru** 103215 points

Hello,

1. Frequency and pulse width limits for forward channel GPIO are defined in the serializer datasheet. Here is an example from the 929 datasheet:

2. Backlight PWM would use a forward channel GPIO0-3, correct

3. Yes using REM_INTB and INTB_IN would be a good method for sending touch interrupts from the 928 side

Best Regards,

Casey

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DS90UB928Q-Q1: Does DS90UB928Q support 1280*800 24bit color 60P TFT- LCD? does it support transfer I2C and Backlight control, reset,interrupt signal from TFT to host?