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JLowe.2
Associate
January 6, 2021
Solved

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.

  • January 6, 2021
  • 2 replies
  • 719 views

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Best answer by Winfred LU

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

2 replies

Winfred LU
Winfred LUBest answer
ST Employee
January 12, 2021

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
JLowe.2Author
Associate
January 12, 2021

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

John