參數(shù)資料
型號(hào): PCL-818L
廠商: Electronic Theatre Controls, Inc.
英文描述: High-performance DAS card with programmable gain
中文描述: 高性能DAS的可編程增益卡
文件頁(yè)數(shù): 35/74頁(yè)
文件大?。?/td> 546K
代理商: PCL-818L
Chapter 4 Register structure and format
31
With continuous triggering the MUX will scan from the start channel
to the end channel, then repeat. For example, if the start channel is 3
and the stop channel is 7, then the scan sequence is 3, 4, 5, 6, 7, 3, 4,
5, 6, 7, 3, 4...
BASE+2 (write) start and stop scan channels
Bit
D7
D6
D5
Value
CH3
CH2
CH1
D4
CH0
D3
CL3
D2
CL2
D1
CL1
D0
CL0
CH3 to CH0
Stop scan channel number
CL3 to CL0
Start scan channel number
The MUX scan register low nibble, CL3 to CL0, also acts as a pointer
when you program the A/D input range (see previous section). When
you set the MUX start channel to N, the range code written to the
register BASE+1 is for channel N.
Programming example
This BASIC code fragment sets the range for channel 5 to ±0.625 V:
200 OUT BASE+2, 5 ‘SET POINTER TO CH.5
210 OUT BASE+1, 3 ‘RANGE CODE=3 FOR ±0.625 V
Note
: The MUX start/stop channel changes each time you change the
input range. Do not forget to reset the MUX start and stop channels to
the correct values after you are finished setting the range.
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