Intel Desktop Board DX79TO Product Guide
USB 2.0 Headers
Figure 20, E shows the location of the USB 2.0 headers. Table 11 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 11. USB 2.0 Header Signal Names
| USB Port A |
|
|
Pin | Signal Name |
|
|
1 | Power (+5 V) |
|
|
3 | D- |
|
|
5 | D+ |
7Ground
9Key
| USB Port B |
Pin | Signal Name |
|
|
2 | Power (+5 V) |
|
|
4 | D- |
|
|
6 | D+ |
|
|
8 | Ground |
|
|
10 | 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
Front Panel Header
Figure 20, G shows the location of the front panel header. Table 12 shows the pin assignments and signal names for the front panel header.
Table 12. Front Panel Header Signal Names
Pin | Description | In/Out | Pin | Description | In/Out |
|
|
|
|
|
|
| Hard Drive Activity LED |
|
| Power LED |
|
|
|
|
|
|
|
1 | Hard disk LED | Out | 2 | Front panel green LED | Out |
|
|
|
|
|
|
3 | Hard disk active LED | Out | 4 | Front panel yellow LED | Out |
|
|
|
|
|
|
| Reset Switch |
|
| On/Off Switch |
|
|
|
|
|
|
|
5 | Ground |
| 6 | Power switch | In |
|
|
|
|
|
|
7 | Reset switch | In | 8 | Ground |
|
| Power |
|
| Not Connected |
|
|
|
|
|
|
|
9 | Power | Out | 10 | No pin |
|
|
|
|
|
|
|
50