Registers Format
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11
3.2 A/D Data Registers
The ACL-8113A provides 32 single-ended A/D input channels , the converted
digital data will store in the A/D data registers after the conversion. The 12
bits A/D data is put into two 8 bits registers. The low byte data (8 LSBs) are
put in address
BASE+4
and the high byte data (4 MSBs) are put in address
BASE+5
. A
DRDY
bit is used to indicate the status of A/D conversion.
DRDY goes to “low” means A/D conversion is completed.
Address:
BASE + 4 and BASE + 5
Attribute:
read only
Data Format:
Bit
7
6
5
4
3
2
1
0
BASE+4
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
BASE+5
0
0
0
DRDY AD11 AD10
AD9
AD8
AD11 .. AD0: Analog to digital data. AD11 is the Most Significant Bit (MSB).
AD0 is the Least Significant Bit(LSB).
DRDY
: Data Ready Signal.
1: A/D data is not ready
0: A/D conversion is completed.
It will be set to 1, when reading the low byte.
3.3 A/D Channel Control Register
This register is used to control the A/D channels to be converted. It's a write
only register. When the channel number is written to the register, the
multiplexer switches to the new channel and await for conversion.
Address:
BASE + 10
Attribute:
write only
Data Format:
Bit
7
6
5
4
3
2
1
0
BASE+10
X
X
X
CL4 CL3
CL2
CL1
CL0
CLn: multiplexer channel number.
CL4 is MSB, and CL0 is LSB.
Summary of Contents for NuDAQ ACL-8113A
Page 1: ...NuDAQ ACL 8113A 12 bit 32 Channels Isolated Analog Input Card User s Guide ...
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