Transmission failed for KEA I2C in Stop mode after waking up

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Transmission failed for KEA I2C in Stop mode after waking up

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vict
Contributor I

Hi all, 

  When the MCU is waken up from the stop mode through I2C address matching, the first transmission will be lost, i.e. no ACK is received.  Is this by design for KEA?

Regard,

Vic

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Hui_Ma
NXP TechSupport
NXP TechSupport

Hi,

There is a note about I2C master baud rate requirement during the wake up process:

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The I2C slave need to run the I2C interrupt ISR after wake up the core from the STOP mode, so there need  I2C master add a short delay for I2C to send the ACK signal. 


Have a great day,
Ma Hui

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