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Gray code is useful because only one bit changes at a time. When used as encoders for a position sensor, for instance, if the sensor were right at the edge of a change boundary, there is uncertainty as to position. Binary code would introduce variable uncertainty in position, because more than one bit can change at a time, but gray code would reduce that uncertainty to being only one bit position in size.

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Gray codes are primarily used to synchronise reads and writes across clock domains, such as analog to digital conversions. Knowing that only one bit of Gray code can change between two successive data writes allows the reader to determine precisely when a write is complete.

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9y ago
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4y ago
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Q: What are the applications of gray code?
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