Contec N Series, Руководство пользователя

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4. Function
COM-4PDHN-USB
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4. Function
This section describes the features of this product.
Communication Function
Serial Data Transmission
Sends and receives data in accordance with the RS-422A/485 standard.
The baud rate for each channel can be set independently in the range 300 to 921,600bps by software.
Send and Receive Data Buffers
Each channel has a separate 128-byte send and 384-byte receive buffer.
The buffers operate as FIFO buffers and help reduce the load on the CPU for high-speed communications
or system operation.
Automatic RTS Control Functions
This function applies to half duplex mode communications.
As half duplex means that the same line is used for sending and receiving, the RTS and CTS signals are
used to switch between sending and receiving. Normally, RTS is set by writing to the corresponding
register bit, but on this product it is controlled by hardware. This reduces the load on the CPU.
If you wish to use this function with the "Standard COM Driver Software COM Setup Disk" from the
bundled disk, it can be specified by the user application.