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Altera_Forum
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9 years ago

Does HPS I2C peripheral support clock stretching?

Does anyone know if the I2C controller perhiperal in the Cyclone V with HPS supports clock stretching (slave holding SCL low while processing a request)?
Altera_Forum's avatar
Altera_Forum
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9 years ago

The HPS TRM states it does support clock stretching:

Clock Synchronization section:

Optionally, slaves may hold the SCL line low to slow down the timing on the I2C bus