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Appendix B: Electrical Interfaces
Appendix B. Electrical Interfaces
The IC293A connects to a single USB port and provides eight RS-232/422/485
software configurable serial ports. The IC293A uses high-speed USB/UARTs with
128-byte TX FIFOs and 384-byte RX FIFOs. The chips feature programmable baud
rates and data rates to 921.6 kbps.
Connector Pinouts
RS-232 (DB9 male)
Figure B-1. DB9 male connector.
Table B-1. RS-232
(DB9 male connector
pinout).
Pin Number
Signal
1
DCD
2
RX
3
TX
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
6
9