29.6.9.1 Write Collision on Stop
If the user writes SSPxBUF when a stop sequence is in progress, then the WCOL bit is set and the contents of the buffer are unchanged (the write does not occur).
If the user writes SSPxBUF when a stop sequence is in progress, then the WCOL bit is set and the contents of the buffer are unchanged (the write does not occur).
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