• State TI Thinks Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 2 answers
  • Subscribers 80 subscribers
  • Views 217 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.

Original question:

MSP-EXP430G2: High Sleep Current at Cold Temperatures

MSP430F5419A: sleep current issue

uppalapati jagadeesh
Prodigy 20 points
Part Number: MSP430F5419A


Hello,

     i am using msp430f5419a controller, so the problem is actual sleep current is 3.6uA but its taking above 4uA  like 20uA and 30uA , what is this issue ? how it will occur?

  • 0
    TI__Expert 4695 points

    Hi,

    Not sure what you mean with sleep current.

    The MSP has different Low power modes.

    Which one have you tried to use?

    I recommend to start with a code example from F5419A product folder.

    Best regards

    Lukas

  • 0
    Expert 1075 points

    Hi uppalapati.

    At first you must stop all using peripheral ports.

    Then you terminate all unused pins according to "1.6 Connection of Unused Pins".

    B.R.

    Massa

  • 0 in reply to Lukas Badura
    Prodigy 20 points

    Hi Lukas,

       

    i am using multiple of MSP430F5419A controllers with LPM3 but some controllers are working fine with 3.6uA  and some other controller sleep current is very high(50uA).

    all controllers used with same code(LPM3)

    please comment me what is issue and tell me how can i test.

    regards ,

    jagadeesh

  • 0 in reply to uppalapati jagadeesh
    TI__Expert 4695 points

    I recommend to use the code example from F5438A product folder / resource explorer if using CCS.

    #include <msp430.h>

    int main(void)
    {
      WDTCTL = WDTPW+WDTHOLD;                   // Stop WDT

      P7SEL |= 0x03;                            // Select XT1
      UCSCTL6 &= ~(XT1OFF);                     // XT1 On
      UCSCTL6 |= XCAP_3;                        // Internal load cap

      // Loop until XT1,XT2 & DCO stabilizes
      do
      {
        UCSCTL7 &= ~(XT2OFFG + XT1LFOFFG + XT1HFOFFG + DCOFFG);
                                                // Clear XT2,XT1,DCO fault flags
        SFRIFG1 &= ~OFIFG;                      // Clear fault flags
      }while (SFRIFG1&OFIFG);                   // Test oscillator fault flag

      UCSCTL6 &= ~(XT1DRIVE_3);                 // Xtal is now stable, reduce drive
                                                // strength

      P1OUT = 0x00;
      P2OUT = 0x00;
      P3OUT = 0x00;
      P4OUT = 0x00;
      P5OUT = 0x00;
      P6OUT = 0x00;
      P7OUT = 0x00;
      P8OUT = 0x00;
      P9OUT = 0x00;
      P10OUT = 0x00;
      P11OUT = 0x00;
      PJOUT = 0x00;

      P1DIR = 0xFF;
      P2DIR = 0xFF;
      P3DIR = 0xFF;
      P4DIR = 0xFF;
      P5DIR = 0xFF;
      P6DIR = 0xFF;
      P7DIR = 0xFF;
      P8DIR = 0xFF;
      P9DIR = 0xFF;
      P10DIR = 0xFF;
      P11DIR = 0xFF;
      PJDIR = 0xFF;

      __bis_SR_register(LPM3_bits);             // Enter LPM3
      __no_operation();                         // For debugger
    }

**Attention** This is a public forum