All pins provide overvoltage protection circuits by using suppressor
diodes. They short
‑
circuit external voltage spikes above 6 V to
ground.
The interrupt inputs have TTL input levels with the following
characteristics.
Electrical characteristics
Parameter
Value
Min.
Max.
Input voltage
High
Low
2.0 V
0 V
5.0 V
0.8 V
Power-up default
The inputs are set to a defined
logical high level by the built-in
10 kΩ pull-up resistors.
Recognizing User Interrupts
To allow the interrupt controller to recognize incoming user
interrupts, the input of the interrupts must be kept high for at least
100 ns. The interrupt is activated by the high to low transition of the
signal. The signal must remain low for at least 100 ns after the
transition.
high
low
t
T
high
T
low
T
high min
:
100 ns
T
low min
:
100 ns
Requests for recognizing
s
Signal Connection to External Devices
t
176
s
DS1103 Hardware Installation and Configuration November 2014
Содержание DS1103
Страница 1: ...DS1103 PPC Controller Board Hardware Installation and Configuration Release 2014 B November 2014 ...
Страница 10: ...s Contents t 10 s DS1103 Hardware Installation and Configuration November 2014 ...
Страница 28: ...s Before You Start t 28 s DS1103 Hardware Installation and Configuration November 2014 ...
Страница 52: ...s Installing the Hardware t 52 s DS1103 Hardware Installation and Configuration November 2014 ...
Страница 102: ...s Uninstalling the System t 102 s DS1103 Hardware Installation and Configuration November 2014 ...
Страница 160: ...s Mapping of I O Signals t 160 s DS1103 Hardware Installation and Configuration November 2014 ...
Страница 218: ...s Troubleshooting t 218 s DS1103 Hardware Installation and Configuration November 2014 ...
Страница 219: ...Data Sheets DS1103 Hardware Installation and Configuration November 2014 219 t ...
Страница 226: ...s Data Sheets t 226 s DS1103 Hardware Installation and Configuration November 2014 ...
Страница 302: ...s Index t 302 s DS1103 Hardware Installation and Configuration November 2014 ...