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5.5.3. Connector X1401 (USB / COM1 / KEYB / PS2 / Ethernet)
DTR1#
Active low data terminal ready output for the serial port. Handshake output signal notifies modem that the
UART is ready to establish data communication link (TTL).
RI1#
Active low input for the serial port. Handshake signal which notifies the UART that the telephone ring
signal is detected by the modem (TTL).
SOUT1
Transmitter serial data output from serial port (TTL).
SIN1
Receiver serial data input (TTL).
CTS1#
Active low input for serial port. Handshake signal which notifies the UART that the modem is ready to
receive data (TTL).
RTS1#
Active low output of serial port. Handshake signal notifies the modem that the UART is ready to transmit
data (TTL).
DCD1#
Active low input for serial port. Handshake signal which notifies the UART that carrier signal is detected
by the modem (TTL).
DSR1#
Active low input for serial port. Handshake signal which notifies the UART that the modem is ready to
establish the communication link (TTL).
KBDAT
This is the Keyboard data signal (TTL).
KBCLK
This is the Keyboard clock signal (TTL).
MDAT
This is the Mouse data signal (TTL).
MCLK
This is the Mouse clock signal (TTL).
IRTX1, IRRX1
Infrared transmit and receive pin (LVTTL).
TXD-, TXD+
Analog Twisted Pair Ethernet Transmit Differential Pair. These pins transmit the serial bit stream for
transmission on the Unshielded Twisted Pair (UTP) cable. The current-driven differential driver can be
two-level (10BASE-T) or three-level (100BASE-TX) signals depending on the mode of operation. These
signals interface directly with an isolation transformer.
RXD-, RXD+
Analog Twisted Pair Ethernet Receive Differential Pair. These pins receive the serial bit stream from the
isolation transformer. The bit stream can be two-level (10BASE-T) or three-level (100BASE-TX) signals
depending on the mode of operation.
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Page 16 of 45 Pages
Connector locations and pinouts
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