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If you do not specify a baud rate, then the speed the console is currently running at will be used (set to a default value of 115200 on the NXP i.MX RT1170 RT EVK).
Once the transmission using loadb finishes, the file will be in memory at the specified load address. The loadaddr environment variable will automatically be set to the address the loadb command used. The filesize environment variable will automatically be set to the number of bytes transferred during the load operation.
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