CCS/MSP430FR6047: MSP430FR6047 Low Power Mode

Hello,

What's your  test code?

Could you try a simple test code as below?

dev.ti.com/tirex/explore/node?node=AKkAI47Fb-RsjK7CPZM37Q__IOGqZri__LATEST

"This resource does not exist. Check your URL or select another resource to view"  your code site warning

My test code is below. In addition I am using TPS62470 in circuit.

When there is no program written into MCU, current is only 2,2uA.

I think, it shows that there is no another component which  draws high current except MCU.

In addditon, I ended unused pins via pull down and out is set to low.

MCLK : DC0 8 MHz

SMCLK : DCO 8 Mhz

ACLK : 32768 Hz from LFXT

I tried VLO instead of LFXT, result was not changed.

int main(void)
{
WDT_A_hold(WDT_A_BASE); //WDT stop
_delay_cycles(100); //delay for settling
PMM_unlockLPM5();

/* init all GPIOs */
HW_initGPIOs();
__PSV_SET_VOLTAGE_TO_2V1; //set MCU rail voltage to 2.1V

/* init sys clock */
HW_initClocks(); 
__delay_cycles(100); //wait a time

__low_power_mode_3(); //__bis_SR_register(LPM3_bits)

while(1)
{

}

//return 0;
}

void HW_initClocks(void)
{
//Set ACLK = XT with clock divider of 1
// Configure Pins for XIN and XOUT
GPIO_setAsPeripheralModuleFunctionInputPin(
LFXIN_PORT,
LFXIN_PIN,
GPIO_PRIMARY_MODULE_FUNCTION
);
GPIO_setAsPeripheralModuleFunctionInputPin(
LFXOUT_PORT,
LFXOUT_PIN,
GPIO_PRIMARY_MODULE_FUNCTION
);
//Set external frequency for XT1
CS_setExternalClockSource(32768,
0);
//Initializes the XT1 crystal oscillator with no timeout
//In case of failure, code hangs here.
//For time-out instead of code hang use CS_turnOnXT1LFWithTimeout()
CS_turnOnLFXT(CS_LFXT_DRIVE_3);
CS_initClockSignal(CS_ACLK,
CS_LFXTCLK_SELECT,
CS_CLOCK_DIVIDER_1);

//Clear all OSC fault flag
CS_clearAllOscFlagsWithTimeout(1000);
//Set DCO frequency to 8MHz Low freq option.
CS_setDCOFreq(CS_DCORSEL_0,
CS_DCOFSEL_6);
//Set SMCLK = DCO with frequency divider of 1
CS_initClockSignal(CS_SMCLK,
CS_DCOCLK_SELECT,
CS_CLOCK_DIVIDER_1);
//Set MCLK = DCO with frequency divider of 1
CS_initClockSignal(CS_MCLK,
CS_DCOCLK_SELECT,
CS_CLOCK_DIVIDER_1);
}

Please try below link:

http://dev.ti.com/tirex/explore/node?node=AKkAl47Fb-RsjK7CPZM37Q__IOGqZri__LATEST

Hi.

I tried code but result is approximetely same (Even, circuit  50uA draws your way)

is my code true? I am using driver lib and I measured ACLK, MCLK and SMCLK with oscilloscope. That are correct values.

what is the problem with LPM3?. Is it only theoretical that LPM3 would be 1uA?

In addition, main rail voltage is only 2.1V

Hello,

The current consumption is tested at 3.3V DVCC.

Please use 3.3V power rail and test again.