Part Number: MSPM0L2117
Other Parts Discussed in Thread: ENERGYTRACE, SYSCONFIG
Hi Pengfei and MSPM0 Support Team,
I am reposting this here because I encountered an error when trying to reply in the original thread below:
Thank you for your detailed clarification.
Our understanding is as follows:
1. The 98 µA/MHz parameter is based on measurements taken at 32 MHz, so it should not be linearly scaled down to estimate RUN current at 32 kHz.
2. At 32 kHz, the operating current in RUN mode is expected to be only slightly higher than the SLEEP mode current with LFCLK, but the actual value should be confirmed through measurement.
3. In Case 2, where the CPU alternates between RUN and HALT, the average current will depend on both the duty cycle and the actual code being executed.
4. To estimate the total current consumption, it is recommended to build a project with the required peripherals enabled and evaluate it using EnergyTrace. We also understand that the LCD is likely to be one of the major contributors to the total current.
5. Regarding the standby target of 0.5 µA, we understand that this cannot be achieved with the current device.
Also, regarding your question about standby mode, in our assumed use case, SRAM retention is required. Could you please let us know whether this condition changes your recommendation or the expected standby current level?
In addition, even simplified measurement results would be very helpful for our internal evaluation.
If possible, could you provide any reference measurement data for a simplified configuration, for example:
- STANDBY current with RTC enabled
- STANDBY current with RTC + LCD enabled
- Average current for a simple RUN/HALT toggling example at 32 kHz
We understand that these values may depend on the test setup, so even approximate or reference-level data would be greatly appreciated.
Best regards,
Conor
