El término Motorola 68HC12 figura en la edición en idioma inglés de Wikipedia. Allí se dice al respecto lo siguiente:
The 68HC12 (6812 or HC12 for short) is a microcontroller family from Freescale Semiconductor. Originally introduced in the mid-1990s, the architecture is an enhancement of the Freescale 68HC11. Programs written for the HC11 are usually compatible with the HC12, which has a few extra instructions. The first 68HC12 derivatives had a maximum bus speed of 8 MHz and flash memory sizes up to 128 kB.
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http://www.cyclopaedia.es/wiki/Motorola_68HC12