AT7456E is a "Single-Channel Monochrome On-Screen Display with Integrated EEPROM" chip, and here's a simple Demoboard of it.
Hardware design at AT7456E-OSD-Demoboard_EasyEDA.
Driver is based on the codes in PDF "AT7456(E) 使用方法及注意事项,2017-03-31,徐建华".
It will be tested with Arduino and I'm planning to use the A9G module produced by Ai-Thinker.
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A simple AT7456E Demoboard.
License: GNU General Public License v3.0