Chapter 2: Hardware

System Hardware

802.11b/g and a/b/g Wireless Client

The HX2 has an 802.11x network card that supports diversity with two internal antennas. The CPU board does not allow hot swapping the network card. Adjusting power management on the network card is set to static dynamic control.

WEP, WPA and LEAP are supported.

Central Processing Unit

The CPU is a 400MHz Intel XScale PXA255 CPU. The operating system is Microsoft® Windows® CE 5. The OS image is stored on an internal SD flash card and is loaded into DRAM for execution.

XScale turbo mode switching is supported and turned on by default.

The HX2 supports the following I/O components of the core logic:

•One SD card slot, inaccessible to the end-user.

•One TTL serial port designed to interface with ring scanner only.

•One RS232 serial port accessible via the desktop cradle.

•USB master accessible via the desktop cradle.

•USB client accessible via the desktop cradle.

•One Digitizer Input port (Touch screen).

System Memory

The 400MHz CPU configuration supports 128MB SDRAM, 128MB SD card. SD card location is inaccessible to the end user.

The system optimizes for the amount of SDRAM available. The operating system executes out of RAM.

Internal flash is used for boot loader code and system low-level diagnostics code. Bootloader code is validated at system startup. The UUID required by CE 5.0 is stored in the boot flash. A second copy of the bootloader code is stored on the internal SD Flash drive, so that if a damaged bootloader is detected, it may be re-flashed correctly.

Internal SD Memory Card

The HX2 has one SD card interface for storage of operating system and program code, as well as persistent storage. The SD slot is inaccessible and ships with a qualified 128MB (optional 512MB) SD Flash card.

The internal SD flash card supports a FAT file system, via a special device driver, and appears to the OS as a folder. This allows the contents to be manipulated via the standard Windows CE interface. Operating system files are hidden on this drive with a terminal unique identifier in the internal flash, to prevent them being accidentally erased by a user. In addition, the registry hive files are stored on this device. The amount of Flash memory available for customer use is the original SD flash card size less 40MB.

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