Chapter 7: Rs-232 Serial Ports; Overview - Xilinx Spartan-3A User Manual
Starter kit board
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R
RS-232 Serial Ports
Overview
As shown in
a female DB9 DCE connector and a male DB9 DTE connector. The DCE-style port connects
directly to the serial port connector available on most personal computers and
workstations via a standard straight-through serial cable. For typical applications, the
board does not require null modem cables, gender changers, or crossover cables.
Use the DTE-style connector to control other RS-232 peripherals, such as modems or
printers, or perform simple loopback testing with the DCE connector.
Spartan-3A/3AN Starter Kit Board User Guide
UG334 (v1.0) May 28, 2007
Figure
7-1, the Spartan-3A/3AN Starter Kit board has two RS-232 serial ports:
Computer
Standard
9-pin serial cable
DCE
DCE
Female DB9
5
4
3
9
8
7
J36
GND
RS-232 Voltage Translator (IC3)
(E16)
(F15)
Figure 7-1: RS-232 Serial Ports
www.xilinx.com
Standard
9-pin serial cable
DTE
2
1
5
4
6
9
GND
FPGA
Chapter 7
RS-232 Peripheral
TALK/DATA
RS CS TR RD TD CD
TALK
DTE
Male DB9
3
2
1
8
7
6
J27
(F16)
(E15)
UG334_c7_01_052407
63
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