Intel Desktop Board DG33BU Product Guide
46
Connecting to the IEEE 1394a Header
See Figure 23, A for the location of the IEEE 1394a header. Table 4 shows the pin
assignments for the header.
Table 4. IEEE 1394a Signal Header 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
Installing a Front Panel Audio Solution for Intel
®
High
Definition Audio
Figure 23, B shows the location of the front panel audio header. Table 5 shows the pin
assignments for the front panel audio header.
Table 5. Front Panel Audio Header Signal Names for Intel High Definition
Audio
Pin Signal Name Pin Signal Name
1 PORT 1L 2 GND
3 PORT 1R 4 PRESENCE#
5 PORT 2R 6 SENSE1_RETURN
7 SENSE_SEND 8 KEY (no pin)
9 PORT 2L 10 SENSE2_RETURN
To install the cable that connects the front panel audio solution to the front panel
audio header, follow these steps:
1. Observe the precautions in "
Before You Begin" on page 25.
2. Turn off all peripheral devices connected to the computer. Turn off the computer
and disconnect the AC power cord.
3. Remove the cover.
4. Install a correctly keyed and shielded front panel audio cable.
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