M2M LOGIC io, Техническое руководство

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RTCU LX4 pro Technical Manual V1.00
Advanced Industrial M2M/IoT Gateway
Logic IO ApS. Ph: (+45) 7625 0210
Holmboes Allé 14 Fax: (+45) 7625 0211
8700 Horsens Page 30 of 39 Email: support@logicio.com
Denmark www.logicio.com
SD-CARD reader
The RTCU LX4 pro device has a standard SD-card reader located on the device's top side (see the
graphical overview). The RTCU LX4 pro supports a FAT file system for standard PC compatibility. In
addition, SDHC cards with up to 32 GB capacity is supported.
The SD-card features a push/push eject system for reliable insertion and operation. Please refer to
Appendix C for the Micro SD card installation guide.
Both the card detect and the write protect 1 information is available to the user through the
application. Please consult the RTCU IDE on-line help for more information. Avoid removing the
Micro SD card during access to the card.
Approved SD-CARDs
To ensure the highest performance and compatibility, it is important to use SD-CARDs approved and
tested by Logic IO.
Commercial grade SD-CARDs can be used in applications where the limited write endurance is
acceptable - for example if the SD-CARD is often replaced. Commercial grade SD-CARDs should
not
be used in applications where the media's potential failure is considered mission-critical.
For applications that extensively use the SD-CARD media and where a failure is critical, it is
recommended to use approved
Industrial Grade SD-CARDs.
Logic IO has approved and recommends industrial-grade SD-CARDs from ATP available in
capacities from 512 MB to 32 GB.
ATP Industrial Grade SD/SDHC Cards are optimized for demanding industrial applications with
consistent performance in all conditions. ATP uses reliable SLC flash technology with a flash
endurance more than 20 times higher than commercial grade products with MLC flash.
The differences in write endurance between commercial-grade MLC flash and ATP Industrial grade
SLC flash is quite remarkable for write-intensive applications:
Product Line Details
Total Writeable Data
Prediction @ 1GB
Time Prediction
@ 500 writes a day (1GB)
ATP Industrial
Grade
SLC Flash
+ Advanced Wear Leveling
80,000GB
or
2,800,000 writes
5,740 days
or
15.7 years
Commercial
Grade
Grade A MLC
(2 bits per cell)
+ Advanced Wear Leveling 4,000GB
or
140,000 writes
280 days
1 This signal is not available, but for compatibility reason the software function will always return “not write protected”