Hardware : Manufacturing FAQs
All Frequently Asked Questions (FAQs), organized by category.
Click "here":http://portal.ember.com/faq/new to view only the most recent entries.
| Can I change the EUI64 used by an Ember radio? | See this introduction to addresses in ZigBee for more background information. Each EM250 and EM260 is programmed by Ember with one of Ember’s IEEE EUI64 addresses. This is programmed into the manufacturing section of the chip’s flash and can not be erased or altered. See Also: |
| Are Ember's ICs RoHS compliant? | EM2420 is availble in ROHS compliant & non-ROHS compliant form. EM250 & EM260 are ROHS compliant. The EM250 and EM260 packages are Deca-BDE compliant in accordance with the European Court of Justice decision about Deca-BDE exemption from RoHS Directive. The EM250 and EM260 are PFOS compliant in accordance with European Directive 2006/122/EC*1 released in December 2006. |
| How does temperature affect radio performance? | The EM250 and EM260 have been fully characterized over Temperature and Voltage variation. In general the chips perform better at colder temperatures than warmer - for both RF and DC characterization. There will be ~5 dB variation in RX Sensitivity and TX Power over temperature. (All values in the Datasheet are at Room Temperature. You can expect a worsening (of about 3dB) at +85C and an improvement (of about 2dB) at -40C. The TX EVM will be worse at +85C than at room temperature, but it should be below the 35% limit. |
| How do I create my own XDV files for loading predetermined manufacturing tokens? | On the subject of tokens (non-volatile settings used in the EmberZNet platform), although many customers use the EM2xx_Patch or EM2USBPatch utility to alter the manufacturing token data on each device at manufacturing time, it is possible, as explained in the EmberZNet Utilities Guide (document 120-4020-0000), to manually create an XDV file that can contain manufacturing token data. This XDV file can then be used with EM2xx_Load or EM2USBLoad to load this data into your devices in addition to any normal flash data (such as bootloader and/or application firmware). |
| Which EM260 firmware image should I load? What are the feature differences between these? | With Ember’s EM260 images, the filenames usually reflect the EZSP serial style used. Depending on the release of EmberZNet you’re using, the firmware filenames may differ according to the significant pieces of functionality that are present/missing from the EM260 network coprocessor [NCP] images. So, for example, in EmberZNet 3.3.0, there is only one SPI EZSP firmware image: em260-spi-with-standalone-bootloader.hex . This supports all features mentioned below, including debug capability and radio+SPI bootloader support. |
| What does the error "SIF_LOADB already low" mean, and what should I do about it? | SIF_LOADB refers to the nSIF_LOAD line used for programming/debugging the EM2xx IC via the 10-pin InSight Port interface. As this line is active-low, it should typically be idling at a high logic level. If the programming utilities (em2xx_load or EM2UsbLoad) detect that the line is idling at a low level (not above the VDD_PADS threshold for high logic) before he programming mode is engaged, they will trigger an error to indicate that the line was in an unexpected state. This kind of problem usually indicates a hardware issue. |
| What kind of export restrictions are there on Ember chips and software? | Export controls for US-based products are regulated by the Bureau of Industry and Security (BIS), part of the United Stated Department of Commerce. |
| Where can I obtain source code for the Rangetest (or HALTest or NodeTest) application? | We don’t provide source code to these pre-built functional test applications, such as Rangetest, because they expose sensitive areas of the stack architecture. However, if you need to customize the test behavior of the Rangetest application, or you want similar functionality in a different interface, you can create your own application binary (or incorporate these test features into your existing application to avoid having to load a separate image during the manufacturing test process) by using Ember’s Manufacturing Test Library, known as “mfglib”. |
| Where is the EUI64 stored on the device? How can I read or set the current EUI64 of a device? |
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