XMC4000 Tips of the day: VADC Wait for Read mode

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Travis
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- The wait-for-read mode prevents data loss due to overwriting a result register with a new conversion result before the CPU has read the previous data.
- This operation mode automatically suspends the start of a conversion for any channel which is assigned to a result register until the result has been read.
- That means, if wait-for-read is enabled for a result register, a request source does not generate a conversion request until the result register has been read.
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