SC9S12XS256J1MAA FREESCALE [Freescale Semiconductor, Inc], SC9S12XS256J1MAA Datasheet - Page 282
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SC9S12XS256J1MAA
Manufacturer Part Number
SC9S12XS256J1MAA
Description
HCS12 Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.SC9S12XS256J1MAA.pdf
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Analog-to-Digital Converter (ADC12B16CV1)
282
CD, CC,
CB, CA
MULT
Field
3–0
4
Multi-Channel Sample Mode — When MULT is 0, the ATD sequence controller samples only from the specified
analog input channel for an entire conversion sequence. The analog channel is selected by channel selection
code (control bits CD/CC/CB/CA located in ATDCTL5). When MULT is 1, the ATD sequence controller samples
across channels. The number of channels sampled is determined by the sequence length value (S8C, S4C, S2C,
S1C). The first analog channel examined is determined by channel selection code (CD, CC, CB, CA control bits);
subsequent channels sampled in the sequence are determined by incrementing the channel selection code or
wrapping around to AN0 (channel 0).
0 Sample only one channel
1 Sample across several channels
Analog Input Channel Select Code — These bits select the analog input channel(s) whose signals are
sampled and converted to digital codes.
channels.
In the case of single channel conversions (MULT=0), this selection code specifies the channel to be examined.
In the case of multiple channel conversions (MULT=1), this selection code specifies the first channel to be
examined in the conversion sequence. Subsequent channels are determined by incrementing the channel
selection code or wrapping around to AN0 (after converting the channel defined by the Wrap Around Channel
Select Bits WRAP3-0 in ATDCTL0). In case of starting with a channel number higher than the one defined by
WRAP3-0 the first wrap around will be AN15 to AN0.
SC
0
Table 10-14. ATDCTL5 Field Descriptions (continued)
CD
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Table 10-15. Analog Input Channel Select Coding
S12XS Family Reference Manual, Rev. 1.09
CC
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
CB
Table 10-15
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Description
CA
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
lists the coding used to select the various analog input
Analog Input
Channel
AN10
AN11
AN12
AN13
AN14
AN15
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AN8
AN9
Freescale Semiconductor
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