Kontron Feature Connector - Kontron COM Express Eval 10 User Manual

5.11 Kontron Feature connector

The Kontron Feature connector provides additional interfaces such as I2C, SMBus or Power Control Signals. See the
table below for detailed pin-out description
Pin Signal Level
1 PWR_+5V 5V power
2 GPO2 3.3V-O
3 #BATLOW 3.3V-I
4 GPI2 3.3V-I
5 #SYS_RESET 3.3V-I
6 WDT 3.3V-O
7 LPC_SERIRQ 3.3V-I
8 - -
9 I2C_DAT 3.3V-IO
10 #SMB_ALERT 3.3V-I
11 I2C_CLK 3.3V-O
12 SMB_DAT 3.3V-IO
13 SMB_CLK 3.3V-O
14 - -
15 #WAKE1 3.3V-I
16 VCC_RTC 3V-I
17 #THRM 3.3V-I
18 GND GND
19 PWR_OK 3.3V-I
20 GND GND
21 #PWRBTN 3.3V-I
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COM Express® Eval Type 10 / Connectors and Features
Signal Description
+5V UL-protected with inductor (600R@100MHz, 1A)
General-purpose power management event output
Battery low input. May be driven low by external circuitry to signal that the system
battery is low, or may be used to signal some other external power management
event.
General-purpose power management event input
This input may be driven low by external circuitry in order to reset the power
management logic
Indicating that a Watchdog Timeout Event has occurred (non buffered module
output)
Serial interrupt request. This pin is used to support the serial interrupt protocol.
Not connected
Data line of I2C-Bus
System Management Bus Alert input. May be driven low by SMB devices in order to
signal an event on the SM Bus
Clock line of I2C-Bus
Clock and data line of SM-Bus.
Not connected
Low driven general purpose wake-up signal
3V backup cell input. Should be connected to a 3V backup cell for RTC operation and
storage register non-volatility in the absence of system power. (VBATT = 2.4 – 3.3V)
Input from off-module temperature sensor indicating an over temperature situation
Ground
High active input indicating that power from the power supply is ready. It can also
be used as low active reset input signal.
Ground
Power Button Input. This input is used to support the ACPI Power Button function.