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DRA821U: Whether DRA821 MCU_i2c0 can work at 1Mbps @ 3.3V power supply mode?

Tao Han
Expert 6455 points
Part Number: DRA821U
Other Parts Discussed in Thread: DRA821

Hi experts

Our customer use DRA821 + TPS65941515 solution. For function safety they must use Q&A mode watchdog, based on EVM PMIC through MCU_I2C0_SCL/SDA (pin F20/H21) communicate with PMIC. But when power supply is 3.3V mode MCU_I2C0 max work speed is 400KHz. PMIC support 1Mbps when work at I2C 3.3V mode.  Customer want to increase the speed of MCU_I2C0 to reduce the MCU task occupy loading.

Whether DRA821 MCU_I2C0 work at 3.3V mode support 1Mbps speed?

Best Regards!

Han Tao