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Parallel Port
Pin
Signal
1
STROBE_L
2
Data bit 0
3
Data bit 1
4
Data bit 2
5
Data bit 3
6
Data bit 4
7
Data bit 5
8
Data bit 6
9
Data bit 7
Serial Ports COM1 and COM2
Pin
Signal
1
DCD
2
RXD
3
TXD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RIA
RJ-45 LAN Connector
Pin
Signal
1
TX+
2
TX-
3
RX+
4
NC
5
NC
6
RX-
7
NC
8
NC
C-6 Connectors
Parallel Port Connector Pinout
Serial Ports COM1 and COM2 Connector Pinout
Description
Data carrier detected
Receive data
Transmit data
Data terminal ready
Ground
Data set ready
Return to send
Clear to send
Ring indication active
RJ-45 LAN Connector Pinout
Description
Transmit data plus—the positive signal for the TD differential pair contains the
serial output data stream transmitted onto the network
Transmit data minus—the negative signal for the TD differential pair contains
the same output as pin 1
Receive data plus—the positive signal for the RD differential pair contains the
serial input data stream received from the network
Receive data minus—the negative signal for the RD differential pair contains
the same input as pin 3
Pin
Signal
10
ACK_L
11
Busy
12
PE
13
SLCT
14
AUTO_L
15
ERROR_L
16
INIT_L
17
SLCTIN_L
18−25
GND
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Troubleshooting
