Page 12
silex
Installing the Evaluation Daughtercard
Part Number 140-00192-100
DB-9
RS-232 Signal
Type
7
RTS
Output (not supported on Serial Port 3)
8
CTS
Input (not supported on Serial Port 3)
9
NC
Serial Port 1 can also be accessed using logic signals via a 10-pin header located at JP6. If you want to
use this header, you must place a jumper on the 2-pin header at JP10 to disable the RS-232 transceiver.
The pinouts are as follows:
Table 6 Logical Serial Port 1 Signal Descriptions
Pin
Signal
Input/Output
Pin
Signal
Input/Output
1
DCD
Input
Enabled via JP9 header
2
DSR
Input
Enabled via JP9 header
3
RXD
Input
4
RTS
Output
5
TXD
Output
6
CTS
Input
7
DTR
Output
Enabled via JP9 header
8
No
Connect
9
GND
10
3.3V
All signals are 0 to 3.3 V logic signals.
The console port (Serial Port 3) can be also be accessed via the 26-pin I/O header pin headers (pin 19 for
TxD and pin 22 for RxD). The console port is normally set to use the DB-9 connector; to use the 26-pin I/O
header, remove the jumper on the header at JP11 so that two sources are not driving the RXD2 signal.
Note that Serial Port 3 is dedicated for use as a console port for configuring the SX-560. Serial port 3 is
always set for operation at 115.2Kbps, 8 bit character size, no parity, and no flow control.
Serial Port 2 is set by default for console operation at 115.2Kbps, 8-bit characters, no parity, and no flow control.
This port can be set as a second I/O port using the SET PORT S2 CONSOLE DISABLE console command.
RS-232 Cable
The supplied DB-9 female-to-female null modem cable is wired as shown below. The pinouts are
compatible with a standard PC 9-pin serial connector, so this cable can be used to directly connect a PC
to Serial Port 3 for use as a console terminal to configure the SX-560. It can also be used to connect
many types of OEM serial devices to Serial Port 1 or Serial Port 2, provided that these devices use PC-
compatible 9-pin connectors.