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The Ultra COMM+8.PCIe provides eight RS-232/422/485 ports from a single PCIe slot.
The Ultra COMM+8.PCIe utilizes the 16C950 UART. This chip features programmable baud
rates, data format, interrupt control and industry leading 128-byte transmit and receive FIFOs.
The UARTs are register compatible with 16C450, 16C550, 16C654 and 16C750 UARTs. The
FIFO depth can be changed to match the depth of these UARTs.
©Sealevel Systems, Inc.
SL9219 – 04/2013
Signal
Name
GND
Ground
TX +
Transmit Data Positive
TX-
Transmit Data Negative
RTS+
Request To Send Positive
RTS-
Request To Send Negative
RX+
Receive Data Positive
RX-
Receive Data Negative
CTS+
Clear To Send Positive
CTS-
Clear To Send Negative
7804e Manual
Pin #
Mode
5
4
Output
3
Output
6
Output
7
Output
1
Input
2
Input
9
Input
8
Input
14
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