Table of Contents
Advertisement
BASE+1
AD11~AD0:
(MSB) of PCI-9113A. AD0 is the Least Significant Bit(LSB).
4.4
A/D Channel Control Register
The PCI-9113A provides 32 analog input channels. The channel control
register is used to set the A/D channel to be converted. The 5 LSBs of this
register control the channel number. Under non-auto scanning mode,
the register sets the channel number for conversion. Under
auto-scanning mode, the register set the ending channel number.
Address: BASE + 0
Attribute: write only
Data Format:
Bit
BASE+0
BASE+1
CNn: multiplexer channel number.
CN4 is MSB, and CN0 is LSB.
4.5
A/D Input Signal Range Control Register
The A/D range register is used to adjust the analog input ranges. This
register directly controls the PGA (programmable gain amplifier). When
a different gain value is set, the analog input range will be changed to its
corresponding value.
Address: BASE + 2
Attribute: write only
Data Format:
Bit
BASE+2
BASE+3
GC0~GC1: A/D Range control setting
The relationship between gain setting and its corresponding A/D range
is listed in the table below.
G2
G1
0
0
x
x
x
Analog to digital data. AD11 is the Most Significant Bit
7
6
x
x
x
x
7
6
5
X
X
X
X
X
X
Analog Input Range
GAIN
Bi-Polar
1
10V
x
AD11
5
4
3
x
CN4
CN3
x
x
x
4
3
X
X
X
X
5V
AD10
AD9
2
1
CN2
CN1
x
x
2
1
X
GC1
X
X
Uni-Polar
10 V
Registers Format
AD8
0
CN0
x
0
GC0
X
19
Advertisement
Table of Contents
