Table of Contents
Advertisement
4.6. Onboard Fan Connector
The analog output voltage on this connector is generated via a discrete linear voltage regulator from the PWM signal
of the HWM. It is clipped at 12 V (+/- 10 %) across the whole input range of the module to prevent fan damage at
higher voltages.
The maximum supply current to the fan connected to the on-module fan connector is 350 mA if the input voltage is
below 13.0 V and is further limited to 150 mA if the input voltage to the module is between 13.0 V and 20.0 V.
Table 12: Onboard Fan Connector
Pin
Signal
1
Fan_Tach_IN#
2
V_FAN
3
GND
Always check the fan specification according to the limitations of the supply current and
supply voltage.
4.7. Watchdog Timer (WDT) Dual Stage
The watchdog timer interrupt is a hardware or software timer implemented by the module to the carrier board if
there is a fault condition in the main program; the watchdog triggers a system reset or other corrective actions after a
specific time, with the aim to bring the system back from a non-responsive to normal state.
The COMe-bID7 supports an independently programmable watchdog that works with two stages that can be used
stage by stage.
Table 13: Dual Staged Watchdog Timer- Time-Out Events
0000b
No action
0001b
Reset
0101b
Delay -> No action
1000b
WDT Only
1001b
Reset + WDT
1101b
DELAY + WDT -> No
action
4.8. Watchdog Timer Signal
The watchdog interrupt (WDT) on COM Express® pin B27 on COM Express® connector indicates a Watchdog time-out
event has not been triggered within a set time. The WDT signal is configurable to any of the two stages. After reset,
the signal is automatically de-asserted. If de-assertion is necessary during runtime, contact Kontron Support for
further help.
4.9. Hyper-Threading
Hyper-Threading (officially termed Hyper Threading Technology or HTT) is an Intel®-proprietary technology used to
improve parallelization of computations performed on PCs. Hyper-Threading works by duplicating certain sections of
the processor – those that store the architectural state but not duplicating the main execution resources. This allows
www.kontron.com
Description
Fan Input voltage from COMe connector
12 V ±10% (max.) across module input range
Power GND
Stage is off and will be skipped
Restarts the module and starts a new POST and operating system
Might be necessary when an operating system must be started and the time for the
first trigger pulse must be extended. Only available in the first stage!
Triggers WDT pin on the carrier board connector (COM Express® pin B27) only
COMe-bID7 User Guide Rev. 1.2
Type
Input
PWR
PWR
// 32
Advertisement
Table of Contents
