Xilinx Spartan-3 User Manual page 33

R
RS-232 Serial Port
The Spartan-3 Starter Kit board has an RS-232 serial port. The RS-232 transmit and receive
signals appear on the female DB9 connector, labeled J2, indicated as
connector is a DCE-style port and connects to the DB9 DTE-style serial port connector
available on most personal computers and workstations. Use a standard straight-through
serial cable to connect the Spartan-3 Starter Kit board to the PC's serial port.
DB9
Connector
6
1
6
2
7
3
8
4
9
5
Figure 7-1
Maxim MAX3232 RS-232 voltage converter, indicated as
supplies serial output data as LVTLL or LVCMOS levels to the Maxim device, which in
turn, converts the logic value to the appropriate RS-232 voltage level. Likewise, the Maxim
Spartan-3 Starter Kit Board User Guide
UG130 (v1.1) May 13, 2005
Maxim MAX3232
RS232 Voltage
Translator
7
DOUT1
RIN1
DOUT2
GND
RIN2
8
J1 Header
Auxiliary Serial Port
Figure 7-1: RS-232 Serial Port
shows the connection between the FPGA and the DB9 connector, including the
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1-800-255-7778
Pin 5
Pin 9
DB9 Serial Port Connector
TXD
DIN1
RXD
ROUT1
TXD-A
DIN2
RXD-A
ROUT2
LD7 LD6 LD5
Receiver
Transmitter
Chapter 7
in Figure
6
Pin 1
Pin 6
(front view)
Spartan-3 FPGA
1
R13
T13
T14
N10
FPGA pin number
UG130_c7_01_072104
in Figure 1-2. The FPGA
7
1-2. The
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