Motorola 68HC12 User's Manual

The A/D converter uses a dedicated port, port AD, for its inputs. There are 8 A/D converter channels on the HC12 and, unlike the 6811, there are also 8 A/D registers allowing 8 simultaneous readings. The implementation of the A/D converter allows for two different methods of operating the A/D converter. This section covers the polling method. ................
................