Kontron KTT30-mITX - Manual (Page 28)

KTD-N0857-A Page 25 Pin Connectors
KTT30/mITX Users Guide
The General Purpose I/O‘s and a few other signals are available through the Feature connector J36.
Signal Description
CASE_OPEN# This signal is used to detect if the system case has been opened.
CORE_PWR_ON
This signal is an active high indication that the T30 CORE rail has been enabled. The signal is
buffered for LED usage.
DEEP_SLEEP
This signal is an active high indication that the system has entered the deep sleep mode. The
signal is buffered for LED usage.
EXT_BAT
EXTernal BATtery option for connecting the plus pin or terminal of an external primary cell battery
(2.5 to 4.0V). The minus pin or terminal should be connected to a GND pin. The external battery is
protected against charging and can be used with or without the onboard battery installed.
CPU_PWR_ON
This signal is an active high indication that the T30 CPU rail has been enabled. The signal is
buffered for LED usage.
The three signals for LED usage assume the following states during power management:
Signal ACTIVE SUSPEND DEEP SLEEP
CORE_PWR_ON High High Low
CPU_PWR_ON High Low Low
DEEP_SLEEP Low Low High
General Purpose I/O Interface
The General Purpose I/O interface is a subset of a multifunction part from NVIDIAs ® Tegra ® 3 SoC. All I/O
pins have additional functionalities which can be changed by software.
The I/O signals are decoupled to 3.3V voltage level by voltage level translators. With one I/O line (NVIDIA
®
label: Q.00) you can enable or disable all voltage level translators:
Active state high level
Tri-state low level
Electrical Specifications
Digital Outputr Min. Typ. Max. Units
Output LOW voltage +0.4 V
Output HIGH voltage +2.9 +3.3 V
Continuous output current per pin 8 mA
Switching rate (Linux) tbd. kHz
Digital Input Min. Typ. Max. Units
Input LOW voltage +1.1 V
Input HIGH voltage +2.2 3.3 +3.8 V
Input rate (Linux) tbd. kHz