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 # 76543210
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
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