Technical and Functional Details
User Interface
GDUTUG500/01
CE-500 MDT Hardware Guide
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Speed: x133
Clocks: Identification mode – 400 kHz, data mode 20 MHz
The MMC / SD (SDHC) card slot is located on the right side panel. By default, a user can physically
access the slot. The platform supports two access protection options. For more details, see the following
section.
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The CE-500 device has a rubber cover that protects the SD card slot, 5V Power-In connector, USB OTG
connector and the SIM card slot from water and dust (for example, when the device is used in the
portable mode out of a vehicle). You must close the cover in any of these conditions.
To prevent access to the connectors, a permanent plastic cover option is available. This cover replaces
the rubber cover. To replace the rubber cover with the plastic one:
1.
Remove the rubber cover by removing the rubber snap in the center of the cover.
2.
Push the plastic cover into the same place.
After the plastic cover is inserted, this cover can only be broken (physically) by an external mechanical
tool to access the card
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The platform provides a Real Time Clock (RTC) that continuously operates even when the device is
powered off, but still connected to a vehicle or an internal battery.
In addition, RTC enables powering on the device based on a predefined alarm.
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To monitor mission-critical processes, the platform provides an intelligent watchdog mechanism. This
mechanism provides various capabilities for programming automatic reset of the terminal. The watchdog
mechanism can be configured to control application stability and restart the device if an application or
system hangs or freezes.
NOTE:
This feature is used for the automatic solution recovery. However, Flash File System
corruption problems can occur if executed during file saving operation.
For more details on proper use of the watchdog mechanism, refer to the
Developers Guide
.
