Intel AP440FX Power Supply Connectors, Primary Power Supply Connector J9H1, Name, Function

Motherboard Description

1.12.6Power Supply Connectors

The AP440FX motherboard must be used with a power supply that supports remote power on/off, so the motherboard can turn off the power under software control. The Powerman utility supplied for Windows 3.1x allows for soft-off as does the shutdown icon in Windows 95 Start menu. The BIOS turns the power off when it receives the proper APM command from the operating system.

For example, Windows 95 issues this APM command after the user selects “Shutdown the computer” option. APM must be enabled in the BIOS and operating system in order for the soft- off feature to work correctly. The user has the ability to determine the state of the power supply, so if the computer was turned on when power was disconnected, the computer turns back on when power is reapplied or it remains off, depending on the user setup configuration in CMOS.

Table 13 provides the pinout listing for the primary power supply connector of the AP440FX motherboard.

Table 13. Primary Power Supply Connector (J9H1)

Pin

1

2

3

4, key

5

6

7, key

8

9

10

11

12

Name

PWRGD

+5 V

+12 V

-12 V

Ground

Ground

Ground

Ground

-5 V

+5 V

+5 V

+5 V

Function

Power good

+5 volts VCC

+12 volts

-12 volts

Ground

Ground

Ground

Ground

-5 volts

+5 volts VCC

+5 volts VCC

+5 volts VCC

Table 14 provides the pinout listing for the external 3.3 volt power supply connector of the AP440FX motherboard.

Table 14. External 3.3 V Power Supply

Connector (J9J1)

Pin

1

2

3

4

5

6 key

Name

Ground

Ground

Ground

+3.3 V

+3.3 V

+3.3 V

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