51
Appendix C
Table C-5 Register for MUX Scan Channel Control
CH3 ~ CH0 Stop scan channel number
CH0
the least significant bit (LSB) of the stop channel
CH3
the most significant bit (MSB)
CL3 ~ CL0 Start scan channel number
CL0
the least significant bit (LSB) of the start channel
CL3
the most significant bit (MSB)
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+01H is for channel N.
Programming example for PCL-818HD
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
Write
MUX scan channel control
Bit #
7
6
5
4
3
2
1
0
BASE + 02H
CH3
CH2
CH1
CH0
CL3
CL2
CL1
CL0
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 cor-
rect values after you finish setting the range.
Summary of Contents for PCL-818 Series
Page 1: ...PCL 818 Series 12 bit ISA Multifunction Card User Manual ...
Page 14: ...PCL 818 Series User Manual 6 Figure 1 1 Installation Flow Chart ...
Page 28: ...PCL 818 Series User Manual 20 ...
Page 45: ...2 APPENDIX A Specifications ...
Page 49: ...2 APPENDIX B Block Diagram ...
Page 51: ...2 APPENDIX C Register Structure Format ...
Page 71: ...2 APPENDIX D Calibration ...