• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 79 subscribers
  • Views 852 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

MSP430F5359: VCORE of MSP430F5359

Shlomi Yehezkia
Mastermind 6150 points
Part Number: MSP430F5359

Hi Team,

 

I have technical question about capacitor VCORE of MSP430F5359IPZR.

 

According to data sheet it should be 470nF±20%, but I during two years produced with capacitor 1uF±20%.  I have changed now this capacitor by 470nF according to Data Sheet.  

Total capacitance on DVCC is about 45uF, therefore CDVCC/CVCORE=45, that is more than 10.

Power voltage of MCU is 3VDC. After power ON,  VCORE is switched to maximum value ( PMMCOREVx=3) and it is not changed till next RESET.  

 

  1. Is this capacitance difference (1uF instead 0.47uF) critical for MSP430 functionality?
  2. Is it critical for our application, where VCORE is maximum and not changed?
  3. What is the risk of functionality for produced 5000 devices?

 

Thanks,

Shlomi

 

 

  • 0
    TI__Guru**** 217867 points
    Hi Shlomi,

    1. Yes, a 470 nF capacitance at VCORE is critical for proper operation of the MSP430 device as specified in TI's datasheet.
    2. The necessary PMMCOREVx level depends on the system frequency used, but level 3 is supported at any frequency with a supply voltage of 3V. The firmware must take caution to raise PMMCOREVx level-by-level and follow the proper SVS/SVM register modifications.
    3. TI cannot guarantee the performance of any device operation which does not follow the specifications outlined by the datasheet.

    Regards,
    Ryan

**Attention** This is a public forum