Dear community,
We have been developing our product with iMX257.
We plan to use Wait Mode for low power consumption.
We would like to monitor the wait state from device outside.
[Question]
Is it possible to verify Wait Mode by observing an outside pin ?
Is it possible to verify Wait Mode by observing a register ?
Do you have any other ideas ?
Best Regards,
Koichi Sakagami
Solved! Go to Solution.
Hi Koichi
according to sect.15.4.3.2.2 Wait Mode MX25 RM:
"In wait mode, the processor clock is gated" so one can observe it
on CLKO pad using setting MCR register CLKO SEL=0111 Gated arm_clk
Also one can set any gpio level 0 before entering low power mode (wfi instruction),
and set to 1 immediately after it (exit from low power mode).
Best regards
igor
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Hi Koichi
according to sect.15.4.3.2.2 Wait Mode MX25 RM:
"In wait mode, the processor clock is gated" so one can observe it
on CLKO pad using setting MCR register CLKO SEL=0111 Gated arm_clk
Also one can set any gpio level 0 before entering low power mode (wfi instruction),
and set to 1 immediately after it (exit from low power mode).
Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------
Dear Igor san,
Thank you for reply.
We will try them.
Best regards,
Koichi Sakagami