If the PDMM or PCMM detects a problem in the firmware, it displays an "r" on the 7-segment display and will automatically enter Recovery Mode. Recovery Mode provides the ability to select and upgrade a firmware image file containing the KAS RuntimeIn computer science, runtime (or run-time) describes the operation of a computer program, the duration of its execution, from beginning to termination (compare compile time). Within KAS, runtime also refers to the virtual machine that manage the program written in a computer language while it is running image on the PDMM or PCMM. In the rare case when Recovery Mode cannot be automatically accessed, pressing and holding B2 at boot will force the PDMM or PCMM to boot into Recovery Mode.
Warning! The Recovery Mode allows any firmware image file to be loaded into the PDMM’s or PCMM's flash memory. The Recovery Mode does NOT check the selected firmware file to verify it’s compatibility with the hardware model. Check that the “Recommended File Name” matches the selected firmware file. If an incompatible firmware file is loaded into the PDMM's or PCMM's flash memory, the PDMM or PCMM will fail to boot into the Runtime image and will fail to automatically boot into Recovery Mode. To recover from this situation requires manually booting into Recovery Mode. For more details, see Booting from the Recovery Image.
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