Have you tried looking at the PIC24FJxxxDA series chips?



> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf
> Of Harold Hallikainen
> Sent: 13 February 2016 01:32
> To: Microcontroller discussion list - Public.
> Subject: Re: [EE] USB to LCD RGB Interface Chip?
>=20
>=20
> > I'm looking at driving an 800x400 LCD over USB. I could do this with a
> > PIC32 controllerless LCD (PMP or EBI DMA) system, but it appears I
> > need a frame buffer. For more than 8 bits per pixel, the frame buffer
> > does not fit on the chip, and costs start going up.
> >
> > In another product, we're sending video over several LVDS pairs to an
> > LVDS to LCD interface chip. That works well there, but the new
> > processor does not have the LVDS lines available. So, we're looking at =
USB.
> >
> > It SEEMS that there would similarly be a USB to RGB LCD controller
> > chip that does not have or need a frame buffer. Instead, the pixels
> > would just be streamed over USB and sent to the LCD.
> >
> > Anyone know of such a chip?
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> Following up on my own post, an idea that comes to mind with the use of t=
he
> PIC32 controllerless LCD system is to only buffer a line at a time.
> The USB could DMA into one line buffer while another line buffer is sent =
to
> the LCD. If the LCD is a little faster than the USB, it can wait for the =
USB DMA
> to fill, then swap buffers. Does something like that sound practical? I'm=
 not
> seeing the need to buffer the whole frame. Can anyone point to what
> documentation as to what USB video would look like coming out of the
> Microchip USB interface?
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> Thanks!
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> Harold
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>=20
>=20
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