[chbot] Parallel sequential memory

Robin Gilks robin at gilks.org
Fri Mar 9 00:21:10 GMT 2018


>
> Does such a beast exist as a stand-alone item?
>
> The interface to a TFT controller such as ILI9486, which contains  over
> 300k of RAM, is a simple 16 bit parallel data/command bus, a data/command
> select line, read/write lines and a reset.
>
> LCD controllers are really fast (easily running up to 50Mbyte/s) and apart
> from the 1000-2000 pins for the display matrix would only require 20 or so
> lines from a micro. Data is written to a rectangle that is define as a
> command over the 16 bit bus and then all read/write operations are
> sequential with an auto-increment inside the chip to each address within
> the bounds of the rectangle.
>
> Sounds like a great storage device for streaming data on a micro.
>
> So where can I get one from?
>

More hunting about and I may have the solution!!
Averlogic AL440B fifo with an I2c interface to allow access to the
internal address registers so it has the sequential access I'm after for
streaming but I can decide where to start a read or write operation.

$3-$4 each on Aliexpress


-- 
Robin Gilks





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