Manual

Electrical Specifications

Each serial port utilizes a 16C950 UART featuring programmable baud rates, data

format, interrupt control and industry-leading 128-byte transmit and receive FIFOs.

This high-performance UART includes 9-bit framing support and is fully software

compatible with legacy 16550 applications. In addition, the 14.7456 oscillator and

UART’s flexible clock prescaler supports the widest range of standard and non-

standard baud rates to 921.6K bps. Refer to Appendix C for cable length limitations.

Connector Pin Assignments

Board Connector (DB25 Male)

The 7205e board includes a DB25 male connector for attaching the included cable

(Item# CA203). The pin out for the DB25M connector is shown in the table below.

Port 1 Pin# Port 2 Pin# RS-232 RS-422/485

1 11 RD RD –

2 12 CTS CTS –

3 13 DCD RD +

4 14 TD TD –

5 15 RTS RTS –

6 16 DSR RTS +

7 17 DTR TD +

8 18 RI CTS +

9 10 GND GND

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COMM+2.LPCIe User Manual