On the I2C module in the BlueNRG-2, the MCR Register has an 'SB' bit, "The Start Byte procedure is prefixed to the current transaction". What does this bit actually do? It does not seem to be documented anywhere.

[Winfred LU · Accepted solution]

It is used to enable/disable sending a start byte, following the I2C start condition and prefixing to this transaction (before the address byte).

[JLowe.2]

Ah, right, before the address byte..... OK, thanks for replying!

John