MSP430F6736: BOR, SVS

HS FAE Germany

Part Number: MSP430F6736

Hello,
customer ask if he needs an external SVS.
The User's Guide stated (page 100): "As DVCC ramps up from 0 V at power up, the BOR keeps the device in reset until VCORE is at a sufficient level for operation at the default MCLK rate and for the SVSH and SVSL mechanisms to be activated."
This means that the SVS would be active at 1.8V and there would be a supervisor gap from BOR =1.30V(TYP)/0.80V(MIN) to VCC=1.8V which has to cover by an external SVS. Right?
Or, is the MSP430 SVS already active?

Regards, Holger

over 4 years ago

0 Johnson He over 4 years ago

TI__Mastermind 30406 points

Hi Holger,

SVS should be active when DCVV high than 1.8V, and BOR will keep reset if the Vcore can't up to sufficient voltage.

Thus, I think don;t need any external SVS. MSP430 can run in 1.8V to 3.6V.

I am not sure if understand your question, please correct me if not.

Thanks!

Best Regards

Johnson

0 HS FAE Germany over 4 years ago in reply to Johnson He

TI__Mastermind 32910 points

Hello Johnson,
the questions if power comes up, the BOR release the MCU at ~VCC=1.5V but then VCC stuck in ramp up at VCC=1.7V. So BOR already released the MCU but SVS is not up. So MCU could do anything undefined?

Regards, Holger

0 Johnson He over 4 years ago in reply to HS FAE Germany

TI__Mastermind 30406 points

Hi Holger,

I think don't need external SVS, I will try to understand the Start-up, SVS, BOR logic when power on and come back soon.

Thanks!

Best Regards

Johnson

0 Johnson He over 4 years ago in reply to Johnson He

TI__Mastermind 30406 points

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MSP430F6736: BOR, SVS