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11 ASMB-785 User Manual

Chapter 1 Hardware Configuration

1.8.1.4 USB power switch (JUSB1/JUSB2)

The ASMB-785 contains a jumper that can support on board USB ports power source

from +5Vsb or +5V. The JUSB1 jumper controls the USB2.0 and 3.0 ports of rear

window. The JUSB2 jumper controls the USB2.0 and 3.0 ports of onboard header

and connectors. The default setting is 1-2 closed which supports USB stand-by

power under S5. When the jumper is 2-3 closed, the on board USB ports power

source will be switched to +5V if you want to disable USB stand-by power under S5,

and under 2-3 closed, which won't support S3 and S4 modes.

1.8.1.5 CPU,SYSTEM fan PWM/DC mode selection(CPUFAN_SEL1, SYSFAN_SEL1)

The ASMB-785 contains a jumper that can support PWM or DC mode. Normally this

jumper should be set with pin 1-2 closed. If you want to change to DC mode, set

CPUFAN_SEL1, SYSFAN_SEL1 to 2-3 closed for disable.

Note! The interrupt output of the watchdog timer is a low level signal. It will be

held low until the watchdog timer is reset.

Table 1.8: USB power switch (JUSB1/JUSB2)

Function Jumper Setting

*+5Vsb

+5V

* default setting

1-2 closed

123

2-3 closed

123

Table 1.9: Fan mode selection (CPUFAN_SEL1, SYSFAN_SEL1)

Function Jumper Setting

*PWM mode

DC mode

* default setting

1-2 closed

123

2-3 closed

123

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