APPARATUS AND METHOD FOR FIRMWARE UPGRADE USING USB
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United States of America Patent
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Issued Date -
Oct 30, 2014
app pub date -
Apr 23, 2014
filing date -
Apr 26, 2013
priority date (Note) -
Abandoned
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Abstract
Disclosed herein is an apparatus and method for upgrading firmware using a universal serial bus (USB). In the method, after setting a flag 1 in a nonvolatile memory mounted on the device, a device is booted in a download mode to download and write firmware binary data in the nonvolatile memory. Then, the device is rebooted after setting a flag 2 in the nonvolatile memory, and booted in a general mode after setting a flag 3 in the nonvolatile memory. Then, USB communication between the device and the computer is checked to determine whether the device succeeds in upgrading the firmware. Thus, even a device with no external key can conveniently upgrade the firmware, and even if power is interrupted during download of a new version of firmware binary data, next booting can be safely performed in the download mode, thereby allowing upgrade of the firmware using the USB.
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