User Manual

26 Oct 05
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other documents or used or disclosed to others for manufacturing or any other purposes except as specifically authorized in writing by Cubic.
5500-62017.A.0
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8
• All keys shall be software configurable.
• Simple single key press detection is required. Multiple, simultaneous, key press operations
are not required for normal operation
• All keys shall be as large as possible allowing for single selection using a gloved hand. The
keys shall be spaced sufficiently apart to minimize inadvertent selection of adjacent buttons.
Figure 2. Keypad Layout
4.4 DCU2 ELECTRONIC DESIGN
The DCU2 hardware consists of the following main components.
• An Electronics Control Module
• A Power Supply Module
• Large backup battery (for RTC, SRAM, & GPS)
• A Keypad controller PCB
• A I/O Connector PCB (Configurable for different connector arrangements for future models)
• A color LCD with backlight
• A WLAN 802.11 b/g (WPA) card with antenna
• A GPS daughter card
• Mini-USB port that can be accessed via underside of the Housing
• Compact Flash