Evaluation board LCD pin mapping

Ashika Ashok11

I have a question on the LCD pin mapping done in the evaluation board.

In the evaluation board LCDDATA23 is mapped to R0, LCDDATA4 to B7 and so on.

But according to the TI errata3.1.1, for 24 bit mode LCDDATA23 is B0 and LCDDATA4 to R7 and so on.

I understand that for 16bit mode R and B are to be swapped. But how can the LCD used in 24bit mode in evaluation board have the swapped configuration.

Kindly help.

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Please post which schematic documents you are referring to.

0 Ashika Ashok11 over 9 years ago in reply to Biser Gatchev-XID

Intellectual 380 points

We are referring to am335x_lcdboard_1.3A schmatic.

Regards

Ashika

0 Biser Gatchev-XID over 9 years ago in reply to Ashika Ashok11

TI__Guru**** 393215 points

Well, do you see the color swap option on the schematic? This is one place where the signals can be swapped, the other is the LCD connector.

0 Ashika Ashok11 over 9 years ago in reply to Biser Gatchev-XID

Intellectual 380 points

Yes, I see the color swap option given. For the LCD used in evaluation board, we wanted to know if LCDDATA23 is mapped to R0 or B0.
According to schematic it is connected to R0. Can you please confirm on this?

0 Biser Gatchev-XID over 9 years ago in reply to Ashika Ashok11

TI__Guru**** 393215 points

I don't have the LCD display datasheet, so I don't know the LCD connector pin assignments. It's possible that the signals are swapped there. If you are designing a new board you must follow Errata 3.1.1.

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Evaluation board LCD pin mapping