Chapter 13 Analog-to-Digital Converter (ADC12B16CV1)
MC9S12XE-Family Reference Manual , Rev. 1.19
510
Freescale Semiconductor
13.3.2.4
ATD Control Register 3 (ATDCTL3)
Writes to this register will abort current conversion sequence.
Read: Anytime
Write: Anytime
1
ASCIE
ATD Sequence Complete Interrupt Enable
0 ATD Sequence Complete interrupt requests are disabled.
1 ATD Sequence Complete interrupt will be requested whenever SCF=1 is set.
0
ACMPIE
ATD Compare Interrupt Enable
— If automatic compare is enabled for conversion
n
(CMPE[
n
]=1 in ATDCMPE
register) this bit enables the compare interrupt. If the CCF[
n
] flag is set (showing a successful compare for
conversion
n
), the compare interrupt is triggered.
0 ATD Compare interrupt requests are disabled.
1 For the conversions in a sequence for which automatic compare is enabled (CMPE[
n
]=1), ATD Compare
Interrupt will be requested whenever any of the respective CCF flags is set.
Table 13-8. External Trigger Configurations
ETRIGLE
ETRIGP
External Trigger Sensitivity
0
0
Falling edge
0
1
Rising edge
1
0
Low level
1
1
High level
Module Base + 0x0003
7
6
5
4
3
2
1
0
R
DJM
S8C
S4C
S2C
S1C
FIFO
FRZ1
FRZ0
W
Reset
0
0
1
0
0
0
0
0
= Unimplemented or Reserved
Figure 13-6. ATD Control Register 3 (ATDCTL3)
Field
Description
7
DJM
Result Register Data Justification
— Result data format is always unsigned. This bit controls justification of
conversion data in the result registers.
0 Left justified data in the result registers.
1 Right justified data in the result registers.
gives examples ATD results for an input signal range between 0 and 5.12 Volts.
Table 13-9. ATDCTL3 Field Descriptions
Table 13-7. ATDCTL2 Field Descriptions (continued)
Field
Description
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