MSP430AFE253: The flash will lose data when the device is powered on and off frequently.

Yale Li 李耀先

Expert 4660 points

Part Number: MSP430AFE253

Hi Team,

The customer is using this device. They use Flash to storage data, and read and write operation works normal.

But when the device is powered on and off frequently, the Flash will lose data.

Thanks & Regards

Yale

over 1 year ago

0 Dennis Lehman over 1 year ago

TI__Guru 70726 points

Hi Yale,

Does the customer's code attempt to write to FLASH during this time? Is the time between power cycles a second, a couple of seconds, a minute...?

0 Yale Li 李耀先 over 1 year ago in reply to Dennis Lehman

TI__Expert 4660 points

Hi Dennis,

They don't do write operation during power on time. The time between power cycle is about 1~2 seconds.

+1 Dennis Lehman over 1 year ago in reply to Yale Li 李耀先

TI__Guru 70726 points

Hi Yale,

Is this a new design or has this product been in the field for some time and they are now experiencing this issue?

This device has both INFO and MAIN memory sections. Do we know if the corruption occurs in one or both of the sections?

Can you find out if the customer is enabling the SVS (Supply voltage supervisor) and what settings?

0 Yale Li 李耀先 over 1 year ago in reply to Dennis Lehman

TI__Expert 4660 points

Hi Dennis,

This is the customer's new design.

They used DCO rather than external oscillation circuit. The data stored in INFO.

They are not enabling the SVS.

Thanks & Regards

Yale

+1 Dennis Lehman over 1 year ago in reply to Yale Li 李耀先

TI__Guru 70726 points

Hi Yale,

Sorry for the late response. Yes, they should enable the SVS. What is the application? Does it have a constant VDD or can VDD vary (like running from battery).

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MSP430AFE253: The flash will lose data when the device is powered on and off frequently.