MSP430FR2033: FRAM memory corruption when voltage applied to IO greater than DVCC+0.3V

Kien

Part Number: MSP430FR2033

Hi team,

There is a case when I have to hot plug-in/out a MSP430FR2033 board to a system. There are chances that voltage applied to several IOs (eg. UART Tx RxD signals) are greater than the (DVCC+0.3V), eg. when the DVCC is lost first or powered later. According to the Absolute Maximum Ratings table in the datasheet, this can damage the device or corrupt the memory. I verified that.

My question is how I can prevent this from happening?

over 4 years ago

0 Wei.Jetim Zhao over 4 years ago

TI__Genius 13215 points

Hi Kien,

I would say you should prevent this by out side of MSP430 device, for example using the external circuit or controlled system work flow to make sure you are following the specification of the MSP430FR2033 Datasheet.

0 Kien over 4 years ago in reply to Wei.Jetim Zhao

TI__Expert 3520 points

Hi Wei,

Thanks for your advice.

I noticed that we've added the memory corruption to the Absolute Maximum Ratings recently. I need some info to support customer. Please let me know whom I should contact to.

0 Wei.Jetim Zhao over 4 years ago in reply to Kien

TI__Genius 13215 points

Hi Kien,

Users should make sure to follow the parameters of Absolute Maximum Ratings. If your customer follows the parameters but still have any issue, please let me know the issue or question from your customer.

0 Kien over 4 years ago in reply to Wei.Jetim Zhao

TI__Expert 3520 points

Wei,

Got it with thanks. However, I want to have some more ideas about the memory corruption case.

Anyone I can talk to?

0 Wei.Jetim Zhao over 4 years ago in reply to Kien

TI__Genius 13215 points

Hi Kien,

I'm sorry I have no idea about any case.

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MSP430FR2033: FRAM memory corruption when voltage applied to IO greater than DVCC+0.3V