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TMS570LC4357: Voltage Monitoring

Christopher TRITANT
Expert 1080 points
Part Number: TMS570LC4357

Hello,

We are using the TMS570LC4357 and we have question about voltage monitoring characteristics (§6.2 in the datashet (spns195c)):

It is desribed in §6.2.2 that "The voltage monitor is disabled when the device enters a low power mode".

- What is the meaning of low power mode in this case ?

- Is it a Low power mode on which module ?

- Is there a Low power mode on core module ?

- Is there a global Low power mode on device ?

Best regards,

Christopher

  • 0
    TI__Guru 59540 points
    Hello Christopher,

    The device supports the ability to enter into a low power mode to reduce the amount of power needed by shutting down various clock domains and peripherals within the device. We define some standard low power modes as doze and sleep which are described in the TRM. The device is woke up by some external stimulus such as the receipt of a CAN message or the assertion of a GPIO input that triggers the GPIO interrupt. This low power mode is moderately useful for applications that need to conserve power such as when using a battery to operate the system. However, we do not specify the LPM currents due to the fact that worst case currents are not very favorable when considered across all possible voltage, temperature, and process combinations. If an application can define a smaller window for the temperature and voltage, there could be some beneficial and repeatable reduction in power.