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Motherboard Description
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1.12.6 Power 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 Name Function
1 PWRGD Power good
2 +5 V +5 volts VCC
3 +12 V +12 volts
4, key -12 V -12 volts
5 Ground Ground
6 Ground Ground
7, key Ground Ground
8 Ground Ground
9 -5 V -5 volts
10 +5 V +5 volts VCC
11 +5 V +5 volts VCC
12 +5 V +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 Name
1 Ground
2 Ground
3 Ground
4 +3.3 V
5 +3.3 V
6 key +3.3 V