PCI2303 Data Acquisition
Chapter 4 Address Assignment
Address 0: 128 bytes MEMORY
Address 1: 128 bytes I/O
Address 2: 16 bytes I/O
Function Description
Offset
Address
Write Read
0x0
DA channel DA16 bit data
DA c
onversion status
Output Enable
Output Enable Status
0x4
“Write” data format when offset address is 0:
D31~D19 D18 D17~D16
D15~D0
Invalid =0
single
channel(default)
Channel number
DA data
=1 all channels
“Read” data format when offset address is 0:
D32~D1 D0
Invalid DA
：
c
onversion status
0
：
DA is converted.
1
：
DA conversion is finished.
Software Process
:
1.
Inquire DA conversion status; wait when the DA is converted.
2.
Output new value when the DA conversion is finished.
“Write” data format when offset address is 4:
D32~D1 D0
Invalid Output
enabled
：
1: Off, all the voltage output is h
igh resistance
(>1M)(default)
0: On, outputs are normal
“Read” data format when offset address is 4:
D32~D1 D0
Invalid
Read back output enabled status
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