measuring current in sleep mode

Hi Karthiga!

First thing you should do is initializing all unused pins - don't leave them floating. Make them outputs, either high or low.

Dennis

Hi Karthiga,
And second thing what you should do is a correct initialization of your clock system. A stable current of 80uA sounds like an active fault flag of your clock system. Please check in our code examples on the product page how to initialize a LF crystal.

Best regards,
Tobias

thank you for ur reply...

I have initialized the clock frequency ...even then for LPM4 i'm not getting current value as 0.1 uA getting 50 micro amps..here is my code

#include <msp430g2553.h>

#define LED0 BIT0
#define LED1 BIT6
#define BUTTON BIT3

static int control; //to make the value non-volatile

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

BCSCTL1 = CALBC1_1MHZ;
DCOCTL = CALDCO_1MHZ;

P1DIR = 0x00;
P1OUT = 0x00;
P1DIR |= (LED0 + LED1); // Set P1.0 to output direction
P1OUT &= ~(LED0 + LED1); // set P1.0 to 0 (LED OFF)
P1IE |= BUTTON; // P1.3 interrupt enabled
P1IES |= BUTTON; // P1.3 Hi/lo edge
P1IFG &= ~BUTTON; // P1.3 IFG cleared
__enable_interrupt(); // enable all interrupts
_BIS_SR(LPM4_bits + GIE); // Enter LPM4 w/interrupt
}


// Port 1 interrupt service routine
#pragma vector=PORT1_VECTOR
__interrupt void Port_1(void)
{
P1IFG &= ~BUTTON; // P1.3 IFG cleared
control++; //incrementing interrupt count
if(control == 10) //checking the count value
{
P1OUT ^= (LED0 + LED1); // P1.0 = toggle
control = 0;//making control to zero
}

}

"P1DIR = 0x00" makes all pins inputs, which is the default anyway. For how to initialize the unused pins, see section 2.5 of the User's Guide.