Intel DX48BT2 Product Guide - Page 51

IEEE 1394a Header, USB 2.0 Headers, Table 9. IEEE 1394a Header Signal Names

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Installing and Replacing Desktop Board Components IEEE 1394a Header Figure 27, F shows the location of the IEEE 1394a header. Table 9 shows the pin assignments and signal names for the IEEE 1394a header. Table 9. IEEE 1394a Header Signal Names Pin Signal Name 1 TPA1+ 3 Ground 5 TPA2+ 7 +12 V 9 Key (no pin) Pin Signal Name 2 TPA1- 4 Ground 6 TPA2- 8 +12 V 10 Ground USB 2.0 Headers Figure 27, G shows the location of the USB 2.0 headers. Table 10 shows the pin assignments and signal names for each USB 2.0 header. Each USB header can be used to connect two USB devices. Table 10. USB 2.0 Header Signal Names USB Port A Pin Signal Name Pin 1 Power (+5 V) 2 3 D- 4 5 D+ 6 7 Ground 8 9 Key 10 Note: USB ports may be assigned as needed. USB Port B Signal Name Power (+5 V) DD+ Ground No Connection NOTE Computer systems that have an unshielded cable attached to a USB port might not meet FCC Class B requirements, even if no device or a low-speed USB device is attached to the cable. Use a shielded cable that meets the requirements for a full-speed USB device. 51

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Installing and Replacing Desktop Board Components
51
IEEE 1394a Header
Figure 27, F shows the location of the IEEE 1394a header.
Table 9 shows the pin
assignments and signal names for the IEEE 1394a header.
Table 9. IEEE 1394a Header Signal Names
Pin
Signal Name
Pin
Signal Name
1
TPA1+
2
TPA1-
3
Ground
4
Ground
5
TPA2+
6
TPA2-
7
+12 V
8
+12 V
9
Key (no pin)
10
Ground
USB 2.0 Headers
Figure 27, G shows the location of the USB 2.0 headers.
Table 10 shows the pin
assignments and signal names for each USB 2.0 header.
Each USB header can be
used to connect two USB devices.
Table 10. USB 2.0 Header Signal Names
USB Port A
USB Port B
Pin
Signal Name
Pin
Signal Name
1
Power (+5 V)
2
Power (+5 V)
3
D-
4
D-
5
D+
6
D+
7
Ground
8
Ground
9
Key
10
No Connection
Note:
USB ports may be assigned as needed.
NOTE
Computer systems that have an unshielded cable attached to a USB port might not
meet FCC Class B requirements, even if no device or a low-speed USB device is
attached to the cable.
Use a shielded cable that meets the requirements for a
full-speed USB device.