Advantech Carbon Monoxide Alarm PCI-1718 Series User Manual
PCI-1718 Series User Manual
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C.3 A/D Data and Channels — BASE+00H~01H
AD11 ~ AD0
Analog to digital data
AD0
The least significant bit (LSB) of the A/D data
AD11
The most significant bit (MSB)
C3 ~ C0
A/D channel number from which the data is derived
C0
The least significant bit (LSB) of the channels
C3
The most significant bit (MSB)
C.4 Software A/D Trigger — BASE+00H
You can trigger an A/D conversion from software, the card's onboard
pacer or an external pulse. If you select software triggering, a write to the
register BASE+00H with any value will trigger an A/D conversion.
pacer or an external pulse. If you select software triggering, a write to the
register BASE+00H with any value will trigger an A/D conversion.
Bits 1 and 0 of register BASE+09H select the trigger source. See page 67
for BASE+09H register layout and programming information.
for BASE+09H register layout and programming information.
Table C.4: Register for A/D Data and Channels
Read
A/D data and channels
Bit #
7
6
5
4
3
2
1
0
BASE + 00H
AD3
AD2 AD1 AD0 C3
C2
C1
C0
BASE + 01H
AD11 AD10 AD9 AD8 AD7 AD6 AD5 AD4
Table C.5: Register for Software A/D Trigger
Write
Software A/D trigger
Bit #
7
6
5
4
3
2
1
0
BASE + 00H
X
X
X
X
X
X
X
X