7521Plus / N N/B MAINTENANCE
5.Pin Descriptions Of Major Components
5.2SiS630S Slot 1/Socket 370 2D/3D Ultra-AGP™ Single Chipset
USB interface |
|
|
|
|
Name | Tolerance | Power | Type | Description |
|
| Plane | Attr |
|
CLK48M | 3.3V/5V | MAIN | I | USB 48 MHz clock input : This signal provides |
|
|
|
| the fundamental clock for the USB Controller. |
OC0# | 3.3V/5V | MAIN | I | USB Port 0 Over Current Detection : OC0# is |
PCIREQ3# |
|
| I | used to detect the over current condition of USB |
GPIO0 |
|
| I/O/OD | Port 0. |
|
|
|
| External PCI Master Request 3: PCIREQ3# is |
|
|
|
| used for PCI Device on PCI Slot 3 to assert its |
|
|
|
| request to hold PCI Bus. |
|
|
|
| General Purpose Input/Output 0 : Refer to GPIO |
|
|
|
| description. |
OC1# | 3.3V/5V | MAIN | I | USB Port 1 Over Current Detection : OC1# is |
PCIGNT3# |
|
| O | used to detect the over current condition of USB |
GPIO1 |
|
| I/O/OD | Port 1. |
|
|
|
| External PCI Master Grant 3 : PCIGNT3# is |
|
|
|
| used to indicate PCI Device on PCI Slot 3 the PCI |
|
|
|
| Bus has been granted. |
|
|
|
| General Purpose Input/Output 1 : Refer to GPIO |
|
|
|
| description. |
OC3# | 3.3V/5V | MAIN | I | USB Port 3 Over Current Detection: OC3# is |
LDRQ1# |
|
| I | used to detect the over current condition of USB |
GPIO2 |
|
| I/O/OD | Port 3. |
|
|
|
| LPC DMA Request 1 : LDRQ1# is the second |
|
|
|
| LPC DMA request signal used by LPC Device to |
|
|
|
| request DMA cycles. |
|
|
|
| General Purpose Input/Output 2 : Refer to GPIO |
|
|
|
| description. |
USBP[4:0]P | 3.3V | AUX | I/O | USB Port [4:0] Positive Input/Output |
USBP[4:0]N | 3.3V | AUX | I/O | USB Port [4:0] Negative Input/Output |
Power andGroundSignals
Name | Tolerance | Power | Type | Description |
|
| Plane | Attr |
|
VSS |
| GROUND |
| 0V |
IVDD |
| MAIN |
| 1.8V |
IVDD(AUX) |
| AUX |
| 1.8V |
OVDD |
| AUX |
| 3.3V |
(AUX) |
|
|
|
|
USBVDD |
| AUX |
| 3.3V |
RTCVDD |
| RTC |
| 1.8V |
DCLKAVDD |
| MAIN |
| 3.3V |
ECLKAVDD |
| MAIN |
| 3.3V |
TXAVDD |
| AUX |
| 3.3V |
RXAVDD |
| AUX |
| 3.3V |
DACAVDD |
| MAIN |
| 3.3V |
IDEAVDD |
| MAIN |
| 1.8V |
SDAVDD |
| MAIN |
| 3.3V |
CPUAVDD |
| MAIN |
| 3.3V |
VTTB |
| MAIN |
| 1.5V |
VSSQ |
| GROUND |
| 0V |
VTTA |
| MAIN |
| 1.5V |
VCC3 |
| MAIN |
| 3.3V |
Legacy I/o and Miscellaneous Signals
Name
SPK
Tolerance | Power | Type |
| Plane | Attr |
3.3V | MAIN | O |
|
|
|
Description
Speaker output : The SPK is connected to the system speaker.
96
