Neousys Technology Nuvo-8240GC Series, Руководство пользователя, Страница: 83 / 139

Nuvo-8240GC Series
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4.1.1 COM Port Configuration
The system’s COM1/ COM2 ports support RS-232 (full-duplex), RS-422 (full-duplex) and
RS-485 (half-duplex) mode. You can set the COM1 operating mode via BIOS settings.
Another option in BIOS called “ Slew Rate ” defines how sharp the rising/falling edge is for the
output signal of COM1. For long-distance RS-422/ 485 transmission, you may set the “ Slew
Rate ” option as “High” to improve signal quality. For RS-422/485 communication, the “ RS-422/
485 Termination ” option determines whether to enable/disable internal termination of RS-422/
485 transceiver according to your wiring configuration (e.g. with or without external
termination).
To set COM port operating mode:
1. Press F2 when the system boots up to enter the BIOS setup utility.
2. Go to [Advanced]

[Peripheral Configuration] .
3. Set the [Set COM1 Mode as] option to the desired mode.
4. Once set, press F10 to save setting and exit.