![](/images/new-backgrounds/1300294/30029433x1.webp)
Base + 8 | Read |
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Bit No. | 7 | 6 |
| 5 |
| 4 | 3 | 2 | 1 | 0 |
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Name |
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| POL | ADCH3 | ADCH2 | ADCH1 | ADCH0 |
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POL | Optocoupler polarity jumper setting; the value indicates the value of an open | |||||||||
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1Open circuit reads as 1, “high” input reads as 0
0Open circuit reads as 0, “high” input reads as 1
ADCH3 - 0 Current A/D channel; this is the channel currently selected on board and is the channel that will be used for the next A/D conversion (unless a new value is written to the channel register before then).
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