RJ-45 LAN Port
47
RJ-45 LAN Port
4
IEEE 1394 Port
4
The IEEE 1394 ports on the Tablet PC and the Tablet
Dock conform to IEEE 1394 standards.
IEEE 1394 cable characteristics follow:
• Suggested maximum cable length: 4.5 meters
• 110 ohms characteristic impedance - differential
mode
• 33 ohms characteristic impedance - common mode
• Relative propagation skew < 400ps @ 100 MHz and
< 100ps @ 400 MHz (the difference between the
differential mode propagation delay of the two
twisted pair conductors that must be measured in
the frequency domain).
• TPA to TPB crosstalk < -26dB (within 1 MHz to
500 MHz range)
• Signal velocity equal to or less than 5.05ns/meter
• Signal pair attenuation:
100MHz = <2.3dB
200MHz = <3.2dB
400MHz = <5.8dB
Table 4-10. LAN Port Pin Assignments
Note: The following table is correct for 10Base-T and 100Base-Tx, but not for
1000Base-T. For 1000Base-T pin assignments, go to one of the following Web sites:
http://www.foundrynet.com/services/documentation/EI48G/b_48Gcables.html
http://home.cfl.rr.com/bjp/RJ45pins.htm
Pin
Signal
Remarks
1
TX+
Tr
2
TX-
Transmit -
3
RX+
R
4
NC
Not used
5
NC
Not used
6
RX-
Receive -
7
NC
Not used
8
NC
Not used
1 2 3 4 5 6 7 8
The IEEE 1394 and USB ports on the Tablet
Dock are independent ports (i.e., they are not
pass-through ports).
Table 4-11. IEEE 1394 Connector Pin Assignments
Pin
Signal
Remarks
1
TPB-
Twisted Pair B - differential
signal
2
TPB+
3
TPA-
Twisted Pair A - differential
signal
4
TPA+
1
2
3
4
