TFP410 interfacing with Micro controller lpc3250

akarshana ileni

Prodigy 20 points

Other Parts Discussed in Thread: TFP410

Hai I am try to interface tfp410 with LPC3250 controller through hard ware not by i2c interface

connections are as below

PD pin is connected to 3.3V through lpc3250 GPO

ISEL is low. ->I2C disabled

EDGE is high ->Rising Edge

BSEL is high -> 24 Bit

DKEN is low ->DSKEW Enabled

CTL1 CTL2 CTL3 are high

HSYNC and VSYNC are connected to COntroller

and DE is High

all these controlling pins are enough or can I change any values

And I am tested with different resolutions in my code

Resolution Output on monitor

320X240 Input not supported

1024X768 Horizontal lines are getting.

I am struck here can any one suggest me or can I interface through I2C only

over 11 years ago

0 Elias Villegas M. over 11 years ago

TI__Guru* 76130 points

Hello,

The TFP410 works with a minimum pixel clock of 25MHz, a resolution of 320x240 will typically have a much slower clock so it will not be supported by the TFP410.

Can you send your schematic for review? How are you connecting VREF, TFADJ, IDCK,?

When you say "...DE is high...", do you mean it is always high?

There are specific timing specs regarding the assertion of DE, HSYNC and VSYNC.

Regards.

0 akarshana ileni over 11 years ago in reply to Elias Villegas M.

Prodigy 20 points

IDCK value is 51.9MHz,

Sorry DE is not always high it is toggling.

B_LCD_ENABLE -LPC3250 LCD_enable pin
B_LCD_VSYNC - LPC3250 LCD_VSYNC
B_LCD_HSYNC - LPC3250 LCD_HSYNC

R307 and R3008 are not connceted to DVI_PD and this pin is controlled by LPC3250 controller. ISEL pin is low and also DSEL pin is low

0 Diego Cortes over 11 years ago in reply to akarshana ileni

TI__Mastermind 36085 points

Hello,

Could you attach the PDF file, I cannot see clearly the datasheet.

Regards,

Diego.

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TFP410 interfacing with Micro controller lpc3250