Chapter 7 Analog-to-Digital Converter (ATD10B16CV4)
MC9S12XDP512 Data Sheet, Rev. 2.11
324 Freescale Semiconductor
7.3.2.3 ATD Control Register 2 (ATDCTL2)

This register controls power down, interrupt and external trigger. Writes to this register will abort current

conversion sequence but will not start a new sequence.

Table 7-5. External Trigger Channel Select Coding

ETRIGSEL ETRIGCH3 ETRIGCH2 ETRIGCH1 ETRIGCH0 External Trigger Source
0 0 0 0 0 AN0
0 0 0 0 1 AN1
0 0 0 1 0 AN2
0 0 0 1 1 AN3
0 0 1 0 0 AN4
0 0 1 0 1 AN5
0 0 1 1 0 AN6
0 0 1 1 1 AN7
0 1 0 0 0 AN8
0 1 0 0 1 AN9
0 1 0 1 0 AN10
0 1 0 1 1 AN11
0 1 1 0 0 AN12
0 1 1 0 1 AN13
0 1 1 1 0 AN14
0 1 1 1 1 AN15
1 0 0 0 0 ETRIG01
1Only if ETRIG[3:0] input option is available (see device speciļ¬cation), else ETRISEL is ignored, that means
external trigger source remains on one of the AD channels selected by ETRIGCH[3:0]
1 0 0 0 1 ETRIG11
1 0 0 1 0 ETRIG21
1 0 0 1 1 ETRIG31
1 0 1 X X Reserved
1 1 X X X Reserved