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R
RS-232 Serial Ports
Overview
As shown in
female DB9 DCE connector and a male 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. Null modem, gender changers,
or crossover cables are not required.
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-3E Starter Kit Board User Guide
UG230 (v1.0) March 9, 2006
Figure
7-1, the Spartan-3E Starter Kit board has two RS-232 serial ports: a
Standard
9-pin serial cable
DCE
DCE
Female DB9
5
4
3
2
1
9
8
7
6
J9
GND
RS-232 Voltage Translator (IC2)
(R7)
(M14)
Spartan-3E FPGA
Figure 7-1: RS-232 Serial Ports
www.xilinx.com
Standard
RS-232 Peripheral
9-pin serial cable
TALK/DATA
DTE
Pin 5
Pin 9
DB9 Serial Port Connector
(front view)
DTE
Male DB9
5
4
3
2
1
9
8
7
6
J10
GND
(U8)
(M13)
Chapter 7
RS CS TR RD TD CD
TALK
Pin 1
Pin 6
UG230_c7_01_022006
59
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