參數(shù)資料
型號(hào)： PCADADIO-CS
英文描述： PC(ISA)BUS I/O CARD
中文描述： 電腦（ISA）總線的I / O卡
文件頁數(shù)： 11/26頁
文件大?。?/td> 393K
代理商： PCADADIO-CS
Page 11
2192-09061-000-000
J489 PCADADIO
Board Functions
Throughout this section ‘+’ indicates a factory set default link.
Link LK1: Pseudo Differential Ground Connection
Link LK2: ADC Interrupt Selection
Link LK2 selects an interrupt source for the ADC which generates an interrupt signal after
conversion is complete and indicates ADC data is ready for reading:
ADC conversion compete is also indicated by the status flag register, whether or not a link is
fitted.
Link LK3: Differential/Single-Ended Input Selection
Link LK4: Counter/Timer Interrupt Selection
Link LK4 selects an interrupt source for the counter/timer channel B. An interrupt will be
generated whenever the OUTB pin of the counter/timer (8254) strobes low to high.
CTC OUTB strobing high is also indicated by the status flag register, whether or not a link is
fitted.
Links LK5, LK6: DAC Output Range
Links LK5 and LK6 selects the output range for DAC1 and DAC0 respectively. The range
settings are as below:
Links LK7, LK8 and R15: ADC Input Ranges
Links LK7, LK8 and R15 select the input range to the ADC. The range settings are as below:
Fit
PCADADIOCS. Fit only if inputs are isolated from 0VA
Omit
PCADADIOCD, differential inputs
LK2A
Sends an interrupt at conversion complete to IRQ2
LK2B
Sends an interrupt at conversion complete to IRQ3
A
PCADADIOCD
B
PCADADIOCS
LK4A
Sends an interrupt to the counter/timer OUTB to IRQ2
LK4B
Sends an interrupt from the counter/timer OUTB to IRQ3
+ LKA
-5V to +5V
LKB
None
0V to 5V
0V to 10V
LK7
+A
A
B
A
Range
-5V to +5V
0V to +10V
-10V to +10V
0V to +5V
LK8
+A
B
A
B
R15
+Omit
Omit
Omit
49.9K
Under no circumstances should both links be fitted to position B
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