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參數(shù)資料
| 型號(hào)： | PCL-818L |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | High-performance DAS card with programmable gain |
| 中文描述： | 高性能DAS的可編程增益卡 |
| 文件頁數(shù)： | 37/74頁 |
| 文件大小： | 546K |
| 代理商： | PCL-818L |
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Chapter 4 Register structure and format
33
A/D status register BASE+8
Read-only register BASE+8 provides information on the A/D configu-
ration and operation. Writing to this I/O port with any data value
clears the its INT bit. The other data bits do not change.
BASE+8 A/D status
Bit
D7
Value
EOC
EOC
End of Conversion.
D6
N/A
D5
MUX
D4
INT
D3
CN3
D2
CN2
D1
CN1
D0
CN0
0
The A/D converter is idle, ready for the next
conversion. Data from the previous conversion is
available in the A/D data registers.
1
The A/D converter is busy, implying that the A/D
conversion is in progress.
MUX
Single-ended/differential channel indicator.
0
8 differential channels
1
16 single-ended channels
INT
Data valid.
0
No A/D conversion has been completed since the
last time the INT bit was cleared. Values in the A/D
data registers are not valid data.
1
The A/D conversion has finished, and converted data
is ready. If the INTE bit of the control register
(BASE +9) is set, an interrupt signal will be sent to
the PC bus through interrupt level IRQn, where n is
specified by bits I2, I1 and I0 of the control register.
Though the A/D status register is read-only, writing
to it with any value will clear the INT bit.
CN3 to CN0
When EOC = 0 these status bits contain the channel
number of the next channel to be converted.
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