• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 21 subscribers
  • Views 488 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPL5110EVM: - question about mcu re-initialization after start up

LzBone
Intellectual 770 points
Part Number: TPL5110EVM
Other Parts Discussed in Thread: CC2541, TPL5100EVM, TPL5110, CC1310, CC2650

Hi,

Firstly, i am reading documentation for TPL5110EVM from following link "http://www.ti.com/product/TPL5110/technicaldocuments"

I understand the basic concept that, TPL5110EVM active power consumption is significantly lower than microcontroller sleep state consumption. I got that.

But i have following questions:

Q1. TPL5110EVM will totally cut off power to mcu during "OFF Time" right. Thats mean, when it back to "ON Time" again, mcu will behave like, just power on and will have to re-initialize all of its routine again, isn't it just consuming more power rather than wake up from sleep state?

 

Q2. Is there  any documentation/experiment that is conducted for Q1 related scenarios using mcu such as CC2541 or CC2641 to verify that TPL5100EVM is saving power even though mcu has to redo the initialization?

Thank you.

LB

  • 0
    TI__Expert 8865 points
    Hi LB,
    I have assigned your question to an expert and he will get back to you very soon.
    Thanks for having patience.
    Best regards
    Puneet
  • 0
    TI__Genius 16845 points
    Hi LB,

    Q1. TPL5110EVM will totally cut off power to mcu during "OFF Time" right. Thats mean, when it back to "ON Time" again, mcu will behave like, just power on and will have to re-initialize all of its routine again, isn't it just consuming more power rather than wake up from sleep state?

    A1. AS the programmed time interval increases, TPL5110 will always consume less current. When comparing the system using a TPL5110 to a system using a MCU in sleep mode, let's assume that the active MCU current is the same in both scenarios and the ON / OFF time intervals are the same. Even if the initialization current is larger than for a system in sleep mode, the currents consumption should be similar in the order of milliamperes. However, the current consumption of the MCU during sleep mode is on the order of micro-amperes level compared to nanoamperes of consumption in TPL5110.

    Q2. Is there any documentation/experiment that is conducted for Q1 related scenarios using mcu such as CC2541 or CC2641 to verify that TPL5100EVM is saving power even though mcu has to redo the initialization?

    A2. I looked and found the following documents with consumption comparisons to CC2650 and CC1310:
    www.ti.com/.../snaa299.pdf - see Figure 4
    www.ti.com/.../tidu797d.pdf - see Figure 16
    www.ti.com/.../tidu995d.pdf - see Figure 16

    KInd regards,
    Lane