55
Appendix C
C.11 Clear Interrupt Request — BASE+08H
Write any value to register BASE+08H to clear the interrupt request.
Table C-11 Register for Clear Interrupt Request
C.12 A/D Status — BASE+08H
Read-only register BASE+08H provides information on the A/D configu-
ration and operation. Including:
• Bipolar or unipolar input for the channel to be converted next
• Single-ended or differential input
• Interrupt status for the channel already converted
• End of conversion for the channel already converted
• Channel to be converted next
Writing to this I/O port with any data value clears its INT bit. The other
data bits do not change.
Table C-12 Register for A/D Status
EOC End of Conversion
0
The A/D conversion is idle, ready for the next conversion. Data
from the previous conversion is available in the A/D data registers.
1
The A/D converter is busy, implying conversion is in progress.
U/B Unipolar/bipolar mode indicator
0 Bipolar
mode
Unipolar mode
Write
A/D control
Bit #
7
6
5
4
3
2
1
0
BASE + 09H
X
X
X
X
X
X
X
X
Read
A/D status
Bit #
7
6
5
4
3
2
1
0
BASE + 08H EOC
U/B
MUX INT
CN3
CN2
CN1
CN0
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 ...
