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IEEE 1394 Port
The IEEE 1394 ports on the Tablet PC and the Tablet
Dock conform to IEE 1394 standards.
P O I N T
The IEEE 1394 and USB ports on the Tablet Dock
are independent ports (i.e., they are not
pass-through ports).
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 @ 100MHz and
< 100ps @ 400MHz (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 1MHz to
500MHz range)
• Signal velocity equal to or less than 5.05ns/
meter
• Signal pair attenuation:
100MHz = <2.3dB
200MHz = <3.2dB
1
400MHz = <5.8dB
Table 4-10. IEEE 1394 Connector Pin Assignments
Pin
Signal
1
TPB-
2
TPB+
3
TPA-
4
TPA+
2
3
4
Remarks
Twisted Pair B -
differential signal
Twisted Pair A -
differential signal
4
RJ-45 LAN Port
1 2 3 4 5 6 7 8
Table 4-11. LAN Port Pin Assignments
Pin
Signal
1
TX+
2
TX-
3
RX+
4
NC
5
NC
6
RX-
7
NC
8
NC
Remarks
Transmit +
Transmit -
Receive +
Not used
Not used
Receive -
Not used
Not used
IEEE 1394 Port
4
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