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WEBENCH® Tools/TMS570LS1224: Disabling peripherals clocks for achive lowest power

Vikram Jain74
Prodigy 160 points

Part Number: TMS570LS1224
Other Parts Discussed in Thread: TMS570LS3137,

Tool/software: WEBENCH® Design Tools

Hi All, 

Can someone help me how do i turn of individual modules clock domains ? I am currently working on a project where i need to go to sleep/low power mode, but this IC doesn't support any sleep/low power mode so i will need to turn off individual clock peripherals and reduce the current consumption. 

Also if someone can guide me to where can i learn about this would be very helpful. As i need to keep CAN1 RX ON so that i can detect the communication on CAN and wake the micro and resume normal mode again. 

Thank you very much. 

  • 0
    TI__Guru 59540 points
    Vikran,

    To be clear, the mechanism to enable low power mode operation is included in the device. The issue is the current draw may not be small enough since low power mode currents include leakage currents that can be significantly high on some devices at high supply voltages and high ambient temperatures. For this reason we do not include LPM currents in our datasheet.

    LPM operation is covered in the device TRM in section 2.4.3. www.ti.com/.../spnu515b.pdf

    A CAN interrupt can be used as a wakeup source but may miss the first message that is sent due to wakeup latency.

    You may also find this application note useful www.ti.com/.../spna173.pdf. Although the methods and data are indicated for the TMS570LS3137 device, you should see similar results for the TMS570LS1224 device.