mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 211

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

6.3.2.2
Writes to this register will abort current conversion sequence but will not start a new sequence.
Read: Anytime
Write: Anytime
Freescale Semiconductor
ETRIGCH[3:0]
ETRIGSEL
Reset
Field
3:0
W
7
R
ETRIGSEL
ATD Control Register 1 (ATDCTL1)
0
7
External Trigger Source Select — This bit selects the external trigger source to be either one of the AD
channels or one of the ETRIG[3:0] inputs. See device specification for availability and connectivity of
ETRIG[3:0] inputs. If ETRIG[3:0] input option is not available, writing a 1 to ETRISEL only sets the bit but has
no effect, that means one of the AD channels (selected by ETRIGCH[3:0]) remains the source for external
trigger. The coding is summarized in
External Trigger Channel Select — These bits select one of the AD channels or one of the ETRIG[3:0] inputs
as source for the external trigger. The coding is summarized in
WRAP3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
= Unimplemented or Reserved
0
0
6
WRAP2
Table 6-3. Multi-Channel Wrap Around Coding
Figure 6-4. ATD Control Register 1 (ATDCTL1)
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Table 6-4. ATDCTL1 Field Descriptions
MC9S12E256 Data Sheet, Rev. 1.08
0
0
5
WRAP1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Table
WRAP0
6-5.
0
0
4
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Description
ETRIGCH3
(MULT = 1) Wrap Around to AN0
Multiple Channel Conversions
Chapter 6 Analog-to-Digital Converter (ATD10B16CV4)
3
1
after Converting
Table
Reserved
ETRIGCH2
AN10
AN11
AN12
AN13
AN14
AN15
6-5.
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AN8
AN9
1
2
ETRIGCH1
1
1
ETRIGCH0
1
0
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