Hi team,
A customer have a query on the MSP430 low power consumption.
The circuit customer used is the minimum system of 5438A directly.
XT1 is connected with 32768 crystal oscillator, XT2 is connected with 16M crystal oscillator.
In IPM3 mode, the power consumption is still more than 400 uA
The 16M crystal oscillator did not stop oscillation,
Please find my program below.
Can you help me troubleshoot it?
what is the reason?
----------------------------------------------
void main( void )
{
WDTCTL = WDTPW+WDTHOLD; // Stop WDT
P5SEL |= BIT2 + BIT3; //P5.2 and P5.3 are selected for Crystal oscillator XT2 input
P7SEL |= 0x03;
UCSCTL6 &= ~(XT1OFF + XT2OFF);
UCSCTL6 |= XCAP_3;
UCSCTL6 &= ~(XT1DRIVE_3);
UCSCTL6 &= ~(XT2DRIVE_2);
do // Loop until XT1,XT2 & DCO stabilizes
{
UCSCTL7 &= ~(XT2OFFG + XT1LFOFFG + XT1HFOFFG + DCOFFG);
SFRIFG1 &= ~OFIFG; // Clear oscillator failure flag
// Delay, waiting for XT2 to start oscillation
} while (SFRIFG1 & OFIFG); // Judge whether XT2 starts oscillation，
UCSCTL4 |= SELA__XT1CLK + SELS__XT2CLK + SELM__XT2CLK;
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);
__no_operation();
}
------------------------------------------------------------------------------------------
Thanks.
