IEI Integration ROCKY-3786 v4.0 - Manual (Page 45)

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ROCKY-3786EV CPU Card
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CN Type: 4-pin header
CN Location: See Figure 3-6
CN Pinouts: See Table 3-8
This 4-pin header connects to audio sources such as CD/DVD-ROM optical drives.
PIN NO. DESCRIPTION
1 CD Left
2 GND
3 GND
4 CD Right
Table 3-8: CD In Connector Pinouts
Figure 3-6: CD In Connector Location
3.2.6 Compact Flash Socket
CN Label: CN25
CN Type: 50-pin header (2x25)
CN Location: See Figure 3-7
CN Pinouts: See Table 3-9