Miscellaneous - ADLINK Technology intel COM Express Express-TL User Manual

Express-TL User's Guide

4.3.10 Miscellaneous

Name Pin # Description
SPKR B32 Output for audio enunciator, the "speaker" in PC-AT
systems
WDT B27 Output indicating that a watchdog time-out event has
occurred.
THRM# B35 Input from off-module temp sensor indicating an over-
temp situation.
THRMTRIP# A35 Active low output indicating that the CPU has entered
thermal shutdown.
FAN_PWMOUT B101 Fan speed control. Uses the Pulse Width Modulation
(PWM) technique to control the fan's RPM.
FAN_TACHIN B102 Fan tachometer input for a fan with a two-pulse output.
TPM_PP A96 Trusted Platform Module (TPM) Physical Presence pin.
Active high. TPM chip has an internal pull down. This
signal is used to indicate Physical Presence to the TPM.
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I/O
O 3.3V
O 3.3V
I 3.3VSB
O 3.3VSB
O OD 3.3V
I OD 3.3V
I 3.3V
Copyright © 2022 ADLINK Technology, Inc.
PU / PD Comment
PU 10K 3.3V
PU 100K
3.3VSB
There shall be PD on carrier board
PU 47K 3.3V
PD 100K PD only when TPM on module.
Modules implementing a TPM shall pull down
PICMG COM.0 R3.0