參數(shù)資料
型號: ADCRM
英文描述: Analog-to-Digital Reference Manual
中文描述: 模擬到數(shù)字參考手冊
文件頁數(shù): 26/46頁
文件大小: 415K
代理商: ADCRM
MOTOROLA
5-6
DIGITAL CONTROL SUBSYSTEM
ADC
REFERENCE MANUAL
5.6 Channel Selection
The value of the channel selection field (CD:CA) in ADCTL1 determines which multi-
plexer input or inputs are used in a conversion sequence. There are 16 possible in-
puts. Eight inputs are external pins (AN[7:0]), and eight are internal.
Table 5-5
summarizes ADC operation when MULT is cleared (single-channel modes).
Table 5-6
summarizes ADC operation when MULT is set (multichannel modes). The
SCAN bit determines whether single or continuous conversion sequences are per-
formed. Channel numbers are given in order of conversion.
Table 5-5 Single-Channel Conversions
S8CM
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
CD
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
CC
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
CB
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
CA
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Input
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
Reserved
Reserved
Reserved
Reserved
V
RH
V
RL
(V
RH
V
RL
) / 2
Test/Reserved
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
Reserved
Reserved
Reserved
Reserved
V
RH
V
RL
(V
RH
– V
RL
) / 2
Test/Reserved
Result Register
RSLT0 – RSLT3
RSLT0 – RSLT3
RSLT0 – RSLT3
RSLT0 – RSLT3
RSLT0 – RSLT3
RSLT0 – RSLT3
RSLT0 – RSLT3
RSLT0 – RSLT3
RSLT0 – RSLT3
RSLT0 – RSLT3
RSLT0 – RSLT3
RSLT0 – RSLT3
RSLT0 – RSLT3
RSLT0 – RSLT3
RSLT0 – RSLT3
RSLT0 – RSLT3
RSLT0 – RSLT7
RSLT0 – RSLT7
RSLT0 – RSLT7
RSLT0 – RSLT7
RSLT0 – RSLT7
RSLT0 – RSLT7
RSLT0 – RSLT7
RSLT0 – RSLT7
RSLT0 – RSLT7
RSLT0 – RSLT7
RSLT0 – RSLT7
RSLT0 – RSLT7
RSLT0 – RSLT7
RSLT0 – RSLT7
RSLT0 – RSLT7
RSLT0 – RSLT7
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
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