User`s guide

5-22 NovaScale R422 Installation and User's Guide
I
2
C to PCI-Express Slot
JI2C1/JI2C2 allows you to enable
the I2C bus to communicate with the
PCI-Express slot. For the jumpers to
work properly, please set both jumpers
to the same setting. If enabled, both
jumpers must be enabled. If disabled,
both jumpers must be disabled. See
the table on the right for jumper
settings.
Watch Dog Enable/Disable
JWD enables the Watch Dog function,
a system monitor that takes action
when a software application freezes
the system. Jumping pins 1-2 will have
WD reboot the system if a program
freezes. Jumping pins 2-3 will generate
a non-maskable interrupt for the
program that has frozen. See the table
on the right for jumper settings. Watch
Dog must also be enabled in BIOS.
I
2
C to PCI-Express Slot
Jumper Settings (JPI
2
C1/JPI
2
C2)
Jumper Setting Defi nition
Closed Enabled
Open Disabled
Watch Dog
Jumper Settings (JWD)
Jumper Setting Defi nition
Pins 1-2 Reset
Pins 2-3 NMI
Open Disabled
NOTE: When Watch Dog is enabled, the user must write their own application
software to disable the Watch Dog Timer.