參數(shù)資料
型號(hào)： QADCRM
英文描述： Queued Analog-to-Digital Converter Reference Manual
中文描述： 排隊(duì)模擬到數(shù)字轉(zhuǎn)換器參考手冊(cè)
文件頁數(shù)： 77/122頁
文件大?。?/td> 940K
代理商： QADCRM
QADC
REFERENCE MANUAL
DIGITAL CONTROL
MOTOROLA
7-31
CHAN[5:0] — Channel Number
The CHAN field selects the input channel number. The software programs the channel
field of the CCW with the channel number corresponding to the analog input pin to be
sampled and converted. The analog input pin channel number assignments and the
pin definitions vary depending on whether the multiplexed or non-multiplexed mode is
used by the application. As far as the queue scanning operations are concerned, there
is no distinction between an internally or externally multiplexed analog input. Refer to
SECTION 4 EXTERNAL MULTIPLEXING
for more information on external multiplex-
ing.
Table 7-8
shows the channel number assignments for the nonmultiplexed mode.
Ta-
ble 7-9
shows the channel number assignments for the multiplexed mode.
Table 7-8 Nonmultiplexed Channel Assignments and Pin Designations
Nonmultiplexed Input Pins
Channel Number in CCW CHAN
Field
Binary
Port Pin
Name
PQB0
PQB1
PQB2
PQB3
—
—
PQB4
PQB5
PQB6
PQB7
PQA0
PQA1
PQA2
PQA3
PQA4
PQA5
PQA6
PQA7
VRL
VRH
—
—
Analog
Pin Name
AN0
AN1
AN2
AN3
—
—
AN48
AN49
AN50
AN51
AN52
AN53
AN54
AN55
AN56
AN57
AN58
AN59
Low Ref
High Ref
Other
Functions
—
—
—
—
Invalid
Reserved
—
—
—
—
—
—
—
ETRIG1
ETRIG2
—
—
—
—
—
Pin Type
Decimal
Input
Input
Input
Input
—
—
Input
Input
Input
Input
000000
000001
000010
000011
0XXXXX
10XXXX
110000
110001
110010
110011
110100
110101
110110
110111
111000
111001
111010
111011
111100
111101
0
1
2
3
4 to 31
32 to 47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input
Input
—
—
V
DDA
/2
End of Queue Code
—
—
111110
111111
62
63
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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