Bridgetek LCD display controller chips
Posted: Tue Mar 19, 2019 8:05 am
An interesting finding by railsrust:
These Human-Machine-Interface chips control an LCD display, a touchscreen, and audio out, have on-chip RAM for display buffer, fonts, textures, had a QSPI MCU interface for control and another QSPI for optional flash storage.
And they are only $5.
The output to the LCD seems to follow video style standards for timing: two sync signals, three 8-bit colour channels. There is a clock output but it's optional, presumably because LCD panels resample according to strict standard timings. With three DACs, or by using only 1 bit for each of RGB, it mightn't be too hard to produce conventional video out, for SCART or VGA or similar.
Web page here:
https://brtchip.com/bt81x/
Datasheet:
https://brtchip.com/wp-content/uploads/ ... _BT81X.pdf
Application note for selecting an LCD display:
https://brtchip.com/wp-content/uploads/ ... isplay.pdf
Quote:
The graphics chip is the Bridgetek BT816...
And they are only $5.
The output to the LCD seems to follow video style standards for timing: two sync signals, three 8-bit colour channels. There is a clock output but it's optional, presumably because LCD panels resample according to strict standard timings. With three DACs, or by using only 1 bit for each of RGB, it mightn't be too hard to produce conventional video out, for SCART or VGA or similar.
Web page here:
https://brtchip.com/bt81x/
Datasheet:
https://brtchip.com/wp-content/uploads/ ... _BT81X.pdf
Application note for selecting an LCD display:
https://brtchip.com/wp-content/uploads/ ... isplay.pdf