MSP430FR6047: MSP430FR6047 design help

Zhonghui Xu

Part Number: MSP430FR6047

Hi team,

I got a question from custom:

We are trying to make watermeter with MSP430FR6047 and working with USS GUI. Because we have such a short distance between two transducer(about 4cm). I need to set a [Gap between pulse start and ADC capture(us)] parameter around 20us. Although the document state the minimum parameter value as 3us, ADC capture display stop working when it goes down to 26us. Please let me know why is this happening.

Please provide a reference answer.thanks

Best regards,

over 3 years ago

0 Eddie LaCost over 3 years ago

TI__Mastermind 38620 points

Hello,

Please see the thread below regarding setting a lower gap.

https://e2e.ti.com/support/microcontrollers/msp430/f/msp-low-power-microcontroller-forum/880810/msp430fr6047-uss-design-center-adc-capture-doesn-t-work-when-gap-between-pulse-start-and-adc-capture-is-set-to-value-lower-than-30us

0 Zhonghui Xu over 3 years ago in reply to Eddie LaCost

TI__Expert 5445 points

Hi LaCost,

Thank you for your reply.I think it is useful.

Could you tell me why was that problem happened?
So that we could debug other similar thing occur.

Best regards,

0 Leonardo Estevez over 3 years ago in reply to Zhonghui Xu

TI__Genius 12615 points

Hi Zhonghui,

This is related to the timed sequence of events of the Acquisition Sequencer. You can learn more about how the acquisition sequencer works in section 21.4 Acquisition Sequencer (ASQ) of the family user's guide:

https://www.ti.com/lit/ug/slau367p/slau367p.pdf

BR,
Leo

0 Zhonghui Xu over 3 years ago in reply to Leonardo Estevez

TI__Expert 5445 points

Hi Estevez,

thanks a lot.

Best regards,

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MSP430FR6047: MSP430FR6047 design help