7521Plus / N N/B MAINTENANCE
5.Pin Descriptions Of Major Components
5.2SiS630S Slot 1/Socket 370 2D/3D Ultra-AGP™ Single Chipset
Power management Interface
Name | Tolerance | Power | Type | Description |
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| Plane | Attr |
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THERM# | 3.3V/5V | MAIN | I | Thermal Detect : THERM# is connected to the |
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| internal |
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| unit as an indication of outstanding thermal event. |
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| An active THERM# event can be used to generate |
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| SCI/SMI#/GPEIRQ. If THERM# is activated for |
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| more than 2 second, a thermal override event will |
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| occur and the system will enter CPU thermal |
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| throttling mode automatically. |
GPIO[6:4] | 3.3V/5V | AUX | I/O/OD | General Purpose Input/Output [6:4]: Refer to GPIO |
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| description. |
Name | Tolerance | Power | Type |
| Description |
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| Plane | Attr |
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PMDAT | 3.3V/5V | AUX | I/OD |
| PS2 Mouse Data: When the internal keyboard and PS2 mouse controllers are |
GPIO12 |
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| I/O/OD | enabled, this pin is | |
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| used as PS2 mouse data signal. |
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| General Purpose Input/Output 12 : Refer to GPIOdescription. |
PMCLK | 3.3V/5V | AUX | I/OD |
| PS2 Mouse Clock: When the internal keyboard and PS2 mouse controllers are |
GPIO13 |
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| I/O/OD | enabled, this pin is used as the PS2 mouse clock signal. | |
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| General Purpose Input/Output 13 : Refer to GPIOdescription. |
KLOCK# | 3.3V/5V | AUX | I |
| Keyboard Lock: When KLOCK# is tied low, the internal keyboard controller |
GPIO14 |
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| I/O/OD | will not respond to | |
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| any |
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| General Purpose Input/Output 14 : Refer to GPIOdescription. |
SMBus Interface
Name | Tolerance | Power | Type |
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| Plane | Attr |
SMBDAT | 3.3V/5V | MAIN | I/OD |
I2CDAT |
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| I/OD |
SMCLK | 3.3V/5V | MAIN | I/OD |
I2CCLK |
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| I/OD |
SMBALT# | 3.3V/5V | AUX | I/OD |
I2CALT# |
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| I/OD |
GPIO15 |
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| I/O/OD |
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Description
SMBus Data : SMBus data input/output pin.
I2C Data : I2C data input/output pin.
SMBus Clock : SMBus clock input/output pin.
I2C Clock : I2C clock input/output pin.
SMBus Alert : This pin is used for SMBus device to wake up the system from sleep state or to generate SCI/SMI#/GPEIRQ.
I2C Alert : This pin is used for I2C device to wake up the system from sleep state or to generate SCI/SMI#/GPEIRQ.
General Purpose Input/Output 15 : Refer to GPIO
description.
LPCInterface
Name | Tolerance | Power | Type | Description |
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| Plane | Attr |
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LAD[3:0] | 3.3V/5V | MAIN | I/O | LPCAddress/Data Bus : LPC controller drives these four pins to transmit LPC |
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| command, address, |
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| and data to LPC device. |
LDRQ# | 3.3V/5V | MAIN | I | LPCDMARequest 0: This pin is used by LPC device to request DMAcycle. |
LFRAME# | 3.3V | MAIN | O | LPCFrame : This pin is used to notify LPCdevice |
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| that a start or a abort LPCcycle will occur. |
SIRQ | 3.3V/5V | MAIN | I/OD | Serial IRQ: This signal is used as the serial IRQ |
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| line signal. |
Keyboard controller Interface
Name | Tolerance | Power | Type | Description |
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| Plane | Attr |
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KBDAT | 3.3V/5V | AUX | I/OD | Keyboard Dada : When the internal keyboard |
GPIO10 |
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| I/O/OD | controller is enabled, this pin is used as the keyboard |
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| data signal. |
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| General Purpose Input/Output 10 : Refer to GPIO |
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| description. |
KBCLK | 3.3V/5V | AUX | I/OD | Keyboard Clock : When the internal keyboard |
GPIO11 |
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| I/O/OD | controller is enabled, this pin is used as the keyboard |
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| clock signal. General Purpose Input/Output 11 : |
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| Refer to GPIO description. |
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