Control
GPIO	General Purpose Input Output, is a flexible parallel interface that allows a variety of custom connections. Supports Digital I/O devices.
SMBus	SMBus is the System Management Bus defined by Intel Corporation in 1995. It is used in personal computers and servers for low-speed system management communications. Today, SMBus is used in all types of embedded systems. The SMBus API allows a developer to interface a Windows XP or CE PC to a downstream embedded system environment and transfer serial messages using the SMBus protocols, allowing multiple simultaneous device control.
I2C	I2C is a bi-directional two wire bus that was developed by Philips for use in their televisions in the 1980s. Today, I2C is used in all types of embedded systems. The I2C API allows a developer to interface a Windows XP or CE PC to a downstream embedded system environment and transfer serial messages using the I2C protocols, allowing multiple simultaneous device control.
Monitor
Watchdog	A watchdog timer (WDT) is a device or electronic card that performs a specific operation after a certain period of time if something goes wrong with an electronic system and the system does not recover on its own. A watchdog timer can be programmed to perform a warm boot (restarting the system) after a certain number of seconds during which a program or computer fails to respond following the most recent mouse click or keyboard action.
Hardware Monitor	The HardWare Monitor (HWM) API is a system health supervision API that inspects certain condition indexes, such as fan speed, temperature and voltage.
Display
Brightness Control	The Brightness Control API allows a developer to interface Windows XP and Windows CE PC to easily control brightness.
Backlight	The Backlight API allows a developer to control the backlight (screen) on/off in Windows XP and Windows CE.

SUSI (Secure & Unified Smart Interface) provides a set of user-friendly, intelligent and integrated interfaces, which speeds development, enhances security and offers add-on value for Advantech platforms. SUSI plays the role of catalyst between developer and solution, and makes Advantech embedded platforms easier and simpler to adopt and operate with customer applications.

SUSI Contains 3 Categories of Features: Control, Display and Monitor

• Control : Control to the devices connected with GPIO, I2C and SMBus buses
  
• Display : Adjust the brightness of LCD panels or turn on/off the power of display devices
  
• Monitor : Monitor the system status, including voltage, temperature, fan speed and Watchdog function to restart if it freezes or crashes.

Benefits

• Faster Time to Market : SUSI's unified API helps developers write applications to control the hardware without knowing the hardware specs of the chipsets and driver architecture.
• Reduced Project Effort : When customers have their own devices connected to the onboard bus, they can either: study the data sheet and write the driver & API from scratch, or they can use SUSI to start the integration with a 50% head start. Developers can reference the sample program on the CD to see and learn more about the software development environment.
• Enhances Hardware Platform Reliability : SUSI provides a trusted custom ready solution which combines chipset and library function support, controlling application development through SUSI enhances reliability and brings peace of mind.

Flexible Upgrade Possibilities : SUSI supports an easy upgrade solution for customers. Customers just need to install the new version SUSI that supports the new functions.