LCD LIDD 8bit mode?

Roger

On the C6748 LCD controller. Is it possible to use LIDD mode outputting 8 bits at a time? I.e. in the frame buffer each pixel is 16 bits (565) and these need to be output 2 x 8bit transfers per pixel.

Roger

over 15 years ago

0 tlee over 15 years ago

TI__Guru 62975 points

Roger,

According to Table 3 in the LCDC user guide ( http://www.ti.com/litv/pdf/sprufm0a ) the LIDD mode does support 8-bit data, but I think the 16-bits/pixel portion of your question depends on the implementation of your LCD module.

-Tommy

0 Roger over 15 years ago in reply to tlee

Expert 1330 points

Tommy,

Thanks, row 2 in the table, though we are not using a "character display". It says "data bus length defined by instruction", what instruction does this refer to?

In rows 3 & 4 of the table (16 bit transfer) it refers to LCD_D[7:0] and DATA[7:0]. I assume it really means LCD_D[15:0] and DATA[15:0]?

Roger

0 tlee over 15 years ago in reply to Roger

TI__Guru 62975 points

Roger,

We're still looking into this. My team does not have access to an LCD LIDD expert so we'll have to try some experiments. If you have an LCD display in mind already, the LCD manufacturer might be able to get you an answer quicker.

-Tommy

0 Roger over 15 years ago in reply to tlee

Expert 1330 points

Tommy,

Thanks. I'm connecting the LCD via 16bits to the '6748 on a breadboard. Then I'll be able to experiment with using only 8 bits.

Regards ---- Roger

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LCD LIDD 8bit mode?