One model of microcontroller-based encoder is known, DMC60C68A, based around an Intel 80C51. In an unknown catalogue entry, it is described as a “keyboard controller” but it is more likely to be an encoder. The diagram showing how to develop for it indicates that it is pin-compatible with the UM6868A.
No keyboards using this chip are known. There are however keyboards with Daewoo–Appian dual-branded chips. The relationship between Daewoo and Appian is not known.
Discovered Daewoo/Appian examples:
|Daewoo Appian DMC80C49-0107C||9217||SEJIN SKE-0107C||Intel MCS-48||Sejin Electron EAT-1010|
|Daewoo Appian DMC80C49-009A||9524||ARON HI-TECH||Intel MCS-48||KPT KPT-84|
All documentation is from The Datasheet Archive.
- DMC60C68A catalogue entry, unknown catalogue