Neousys Technology NRU Series, Руководство пользователя

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NRU Series
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2.3.9 DIO Port
The system provides 1x GPS PPS input, 3-CH isolated DI and 4-CH isolated DO
output channels. The DO is followed by open-drain design, i.e., the output voltage is
decided by the external power source. And we recommended to design the external
power source between 5V to 24V. The DI treat 0 to 1.5V voltage input as 0, and treat
5 to 40V voltage input as 1. In Linux, each GPIO is mapped to a virtual folder. And
the PPS0 is defined in our official device tree. Please refer to the following table for
information on wiring and programming the isolated DIO channels.
Pin No. Definition I/O GPIO in Linux Description
1 ISO_DI3H I gpio326 Digital input channel 3
2 ISO_DI2H I gpio331 Digital input channel 2
3 ISO_DI1H I gpio325 Digital input channel 1
4 ISO_DI0H I pps0 GPS PPS input
5 ISO_DO3 O gpio323 Digital output channel 3
6 ISO_DO2 O gpio322 Digital output channel 2
7 ISO_DO1 O gpio321 Digital output channel 1
8 ISO_DO0 O gpio320 Digital output channel 0
9 Reserved - - Reserved pin. Keep
unconnected
10
11
12
13
14 ISO_DI3L - - Digital input channel 3
15 ISO_DI2L - - Digital input channel 2
16 ISO_DI1L - - Digital input channel 1
17 ISO_DI0L - - Digital input channel 0
18 EOGND - - Digital output GND
19 EOGND - - Digital output GND
20 EOGND - - Digital output GND
21 EOGND - - Digital output GND
22 Reserved - - Reserved pin. Keep