Seco COMe-C55-CT6 User Manual page 45

Com express type 6 module with the intel 8 th generation core and celeron 4000 cpus

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3.2.5.15 Miscellaneous signals

Here following, a list of COM Express

SPKR: Speaker output, +3.3V_ALW voltage signal, managed by the embedded PCH's embedded counter 2.

WDT: Watchdog event indicator Output. It is an active high signal, +3.3V_ALW voltage. When this signal goes high (active), it reports out to the devices on the Carrier

board that internal Watchdog

s timer expired without being triggered, neither via HW nor via SW. This signal is managed by the module

FAN_PWM_OUT*:

PWM output for FAN speed management, +3.3V_RUN voltage signal. It is managed by the module

FAN_TACHOIN*:

External FAN Tachometer Input. +3.3V_RUN voltage signal, directly managed by the module

TPM_PP: Trusted Platform Module (TPM) Physical Presence Input, +3.3V_ALW voltage signal with 10kΩ pull-down resistor, managed by the optional TPM device

on-module.

THRM#: Thermal Alarm Input. Active Low +3.3V_RUN voltage signal with 10kΩ pull-up resistor, directly managed by the module

input gives the possibility, to carrier board

THRMTRIP#: Active Low +3.3V_ALW voltage output signal. This signal is used to communicate to the carrier board

CPU began the shutdown in order to prevent physical damages.

* Note:

In COM Express

specifications prior to Rel. 2.0, the pins dedicated to FAN management were dedicated to +12V

to the module, in case it is inserted in carrier board not designed for Type 6, then protection circuitry has been added on FAN_PWM_OUT and FAN_TACHOIN lines

so that they are +12V Tolerant.

3.2.5.16 Power Management signals

According to COM Express

specifications, on the connector AB there is a set of signals that are used to manage the power rails and power states.

The signals involved are:

PWRBTN#: Power Button Input, active low, +3.3V_ALW buffered voltage signal with 47kΩ pull-up resistor. When working in ATX mode, this signal can be connected

to a momentary push-button: a pulse to GND of this signal will switch power supply On or Off.

SYS_RESET#: Reset Button Input, active low, +3.3V_ALW voltage signal with 47kΩ pull-up resistor. This signal can be connected to a momentary push-button: a

pulse to GND of this signal will reset the COMe-C55-CT6 module.

CB_RESET#: System Reset Output, active low, +3.3V_ALW voltage buffered signal. It can be used directly to drive externally a single RESET Signal. In case it is

necessary to supply Reset signal to multiple devices, a buffer on the carrier board is recommended.

PWR_OK: Power Good Input, +3.3V_RUN active high signal. It must be driven by the carrier board to signal that power supply section is ready and stable. When

this signal is asserted, the module will begin the boot phase. The signal must be kept asserted for all the time that the module is working.

SUS_STAT#: Suspend status output, active low +3.3V_ALW electrical voltage signal. This output can be used to report to the devices on the carrier board that the

COMe-C55-CT6

compliant signals that complete the features of COMe-C55-CT6 module.

s hardware, to indicate to the main module an overheating situation, so that the CPU can begin thermal throttling.

s embedded microcontroller.

s embedded microcontroller. This

s devices that, due to excessive overheating, the

power rail. In order to prevent damages

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