MSP430FR5994: The device's into lpm4 low power mode is abnormal

Part Number:MSP430FR5994

hi,hello all

MSP430FR5994 48pin package into lpm4  power consumption  70-85ua , the other 80pin package  power consumption 0.6ua , i'd try many way to test 48pin package,it is still 70-85ua, software and hardware show as following, tks

#include <msp430.h>

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

    // Configure GPIO
    P1OUT = 0x00;
    P1DIR = 0xFF;

    P2OUT = 0x00;
    P2DIR = 0xFF;

    P3OUT = 0x00;
    P3DIR = 0xFF;

    P4OUT = 0x00;
    P4DIR = 0xFF;

    P5OUT = 0x00;
    P5DIR = 0xFF;

    P6OUT = 0x00;
    P6DIR = 0xFF;

    P7OUT = 0x00;
    P7DIR = 0xFF;

    P8OUT = 0x00;
    P8DIR = 0xFF;

    PJOUT = 0x00;
    PJDIR = 0xFFFF;

    // Disable the GPIO power-on default high-impedance mode to activate
    // previously configured port settings
    PM5CTL0 &= ~LOCKLPM5;

    // Clock System Setup
    CSCTL0_H = CSKEY_H;                     // Unlock CS registers
    CSCTL1 = DCOFSEL_6;                     // Set DCO to 8MHz
    CSCTL2 = SELA__VLOCLK | SELS__DCOCLK | SELM__DCOCLK;  // Set SMCLK = MCLK = DCO
                                            // ACLK = VLOCLK
    CSCTL3 = DIVA__1 | DIVS__1 | DIVM__1;   // set all dividers
    CSCTL0_H = 0;                           // Lock CS registers

    __bis_SR_register(LPM4_bits);
    __no_operation();                       // For debugger
}

XT1  and XT2 are not on the board