MC9S12G Datasheet, PDF (242/1160 Pages) Freescale Semiconductor, Inc – Ignores external trigger. Performs one conversion sequence and stops.

S12G Memory Map Controller (S12GMMCV1)
BDM HARDWARE COMMAND
Global Address [17:0]
Bit17
Bit14 Bit13
Bit0
BDMPPR Register [3:0]
BDM Local Address [13:0]
BDM FIRMWARE COMMAND
Global Address [17:0]
Bit17
Bit14 Bit13
Bit0
BDMPPR Register [3:0]
CPU Local Address [13:0]
Figure 5-10.
MC9S12G Family Reference Manual, Rev.1.01
242
Freescale Semiconductor
This document is valid for the S12G96 and the S12G128 device. All information related to other devices is preliminary.