LP-MSP430FR2476: Higher power consumption than that mentioned in datasheet

/* --COPYRIGHT--,BSD-3-Clause-With-EX
 * Copyright (c) 2017, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *******************************************************************************
 * 
 *                       MSP430 CODE EXAMPLE DISCLAIMER
 *
 * MSP430 code examples are self-contained low-level programs that typically
 * demonstrate a single peripheral function or device feature in a highly
 * concise manner. For this the code may rely on the device's power-on default
 * register values and settings such as the clock configuration and care must
 * be taken when combining code from several examples to avoid potential side
 * effects. Also see www.ti.com/grace for a GUI- and www.ti.com/msp430ware
 * for an API functional library-approach to peripheral configuration.
 *
 * --/COPYRIGHT--*/
//******************************************************************************
//  MSP430FR267x Demo - LPM4.5, Device enters LPM4.5 waiting for a port
//                       interrupt on P1.3 with SVS disabled
//
//   Description: Download and run the program. Program automatically enters
//                LPM4.5 and measure the current. Use button SW2 (or P1.3) on the
//                Target board to wake the device up from LPM4.5. This enables
//                the LFXT oscillator and blink the LED (on P1.0).
//
//   ACLK = XT1 = 32kHz, MCLK = SMCLK = default DCODIV = ~1MHz.
//
//                MSP430FR2676
//         -----------------
//     /|\|                 |
//      | |                 |
//      | |        XIN(P2.1)|--
//      --|RST              |  32768Hz
//        |       XOUT(P2.0)|--
//        |                 |
//        |             P1.0|-->LED
//        |                 |
//        |             P1.3|<---Button
//
//   Longyu Fang
//   Texas Instruments Inc.
//   August 2018
//   Built with IAR Embedded Workbench v7.12.1 & Code Composer Studio v8.1.0
//******************************************************************************
#include <msp430.h>

void initGpio(void);

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

    // Configure GPIO
    initGpio();

    // Determine whether we are coming out of an LPMx.5 or a regular RESET.
    if (SYSRSTIV == SYSRSTIV_LPM5WU)        // MSP430 just woke up from LPMx.5
    {

        // Initialize XT1 32kHz crystal
        P2SEL0 |= BIT0 | BIT1;                  // P2.0~P2.1: crystal pins
        do
        {
            CSCTL7 &= ~(XT1OFFG | DCOFFG);  // Clear XT1 and DCO fault flag
            SFRIFG1 &= ~OFIFG;
        } while (SFRIFG1 & OFIFG);          // Test oscillator fault flag
    }
    else
    {
        // Device powered up from a cold start.
        // It configures the device and puts the device into LPM4.5

        P1DIR &= ~BIT3;                     // Configure P1.3 as input direction pin
        P1OUT |= BIT3;                      // Configure P1.3 as pulled-up
        P1REN |= BIT3;                      // P1.3 pull-up register enable
        P1IES |= BIT3;                      // P1.3 Hi/Low edge
        P1IFG = 0;                          // Clear all P1 interrupt flags
        P1IE |= BIT3;                       // P1.3 interrupt enabled

        // Explicitly clear RTC control registers to disable it
        // just incase if the RTC was previously enabled
        RTCCTL = 0;

        PMMCTL0_H = PMMPW_H;                // Open PMM Registers for write
        PMMCTL0_L &= ~(SVSHE);              // Disable high-side SVS
        PMMCTL0_L |= PMMREGOFF;             // and set PMMREGOFF
        PMMCTL0_H = 0;                      // Lock PMM Registers

        // Enter LPM4 Note that this operation does not return. The LPM4.5
        // will exit through a RESET event, resulting in a re-start
        // of the code.
        __bis_SR_register(LPM4_bits | GIE);
    }

    // Now blink the LED in an endless loop.
    while (1)
    {
        P1OUT ^= BIT0;                      // P1.0 = toggle
        __delay_cycles(1000000);
    }
}

void initGpio()
{
    P1DIR = 0xFF; P2DIR = 0xFF;
    P1REN = 0xFF; P2REN = 0xFF;
    P1OUT = 0x00; P2OUT = 0x00;

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

/* --COPYRIGHT--,BSD-3-Clause-With-EX
 * Copyright (c) 2017, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *******************************************************************************
 * 
 *                       MSP430 CODE EXAMPLE DISCLAIMER
 *
 * MSP430 code examples are self-contained low-level programs that typically
 * demonstrate a single peripheral function or device feature in a highly
 * concise manner. For this the code may rely on the device's power-on default
 * register values and settings such as the clock configuration and care must
 * be taken when combining code from several examples to avoid potential side
 * effects. Also see www.ti.com/grace for a GUI- and www.ti.com/msp430ware
 * for an API functional library-approach to peripheral configuration.
 *
 * --/COPYRIGHT--*/
//******************************************************************************
//  MSP430FR267x Demo - LPM4.5, Device enters LPM4.5 waiting for a port
//                       interrupt on P1.3 with SVS disabled
//
//   Description: Download and run the program. Program automatically enters
//                LPM4.5 and measure the current. Use button SW2 (or P1.3) on the
//                Target board to wake the device up from LPM4.5. This enables
//                the LFXT oscillator and blink the LED (on P1.0).
//
//   ACLK = XT1 = 32kHz, MCLK = SMCLK = default DCODIV = ~1MHz.
//
//                MSP430FR2676
//         -----------------
//     /|\|                 |
//      | |                 |
//      | |        XIN(P2.1)|--
//      --|RST              |  32768Hz
//        |       XOUT(P2.0)|--
//        |                 |
//        |             P1.0|-->LED
//        |                 |
//        |             P1.3|<---Button
//
//   Longyu Fang
//   Texas Instruments Inc.
//   August 2018
//   Built with IAR Embedded Workbench v7.12.1 & Code Composer Studio v8.1.0
//******************************************************************************
#include <msp430.h>

void initGpio(void);

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

    // Configure GPIO
    initGpio();

    // Determine whether we are coming out of an LPMx.5 or a regular RESET.
    if (SYSRSTIV == SYSRSTIV_LPM5WU)        // MSP430 just woke up from LPMx.5
    {

        // Initialize XT1 32kHz crystal
        P2SEL0 |= BIT0 | BIT1;                  // P2.0~P2.1: crystal pins
        do
        {
            CSCTL7 &= ~(XT1OFFG | DCOFFG);  // Clear XT1 and DCO fault flag
            SFRIFG1 &= ~OFIFG;
        } while (SFRIFG1 & OFIFG);          // Test oscillator fault flag
    }
    else
    {
        // Device powered up from a cold start.
        // It configures the device and puts the device into LPM4.5

        P1DIR &= ~BIT3;                     // Configure P1.3 as input direction pin
        P1OUT |= BIT3;                      // Configure P1.3 as pulled-up
        P1REN |= BIT3;                      // P1.3 pull-up register enable
        P1IES |= BIT3;                      // P1.3 Hi/Low edge
        P1IFG = 0;                          // Clear all P1 interrupt flags
        P1IE |= BIT3;                       // P1.3 interrupt enabled

        // Explicitly clear RTC control registers to disable it
        // just incase if the RTC was previously enabled
        RTCCTL = 0;

        PMMCTL0_H = PMMPW_H;                // Open PMM Registers for write
        PMMCTL0_L &= ~(SVSHE);              // Disable high-side SVS
        PMMCTL0_L |= PMMREGOFF;             // and set PMMREGOFF
        PMMCTL0_H = 0;                      // Lock PMM Registers

        // Enter LPM4 Note that this operation does not return. The LPM4.5
        // will exit through a RESET event, resulting in a re-start
        // of the code.
        __bis_SR_register(LPM4_bits | GIE);
    }

    // Now blink the LED in an endless loop.
    while (1)
    {
        P1OUT ^= BIT0;                      // P1.0 = toggle
        __delay_cycles(1000000);
    }
}

void initGpio()
{
    P1DIR = 0xFF; 
    P2DIR = 0xFF;
    P3DIR = 0xFF;
    P4DIR = 0xFF;
    P5DIR = 0xFF;
    P6DIR = 0xFF;
    
    //P1REN = 0xFF;
    //P2REN = 0xFF;
    //P3REN = 0xFF;
    //P4REN = 0xFF;
    //P5REN = 0xFF;
    //P6REN = 0xFF;
    
    P1OUT = 0x00;
    P2OUT = 0x00;
    P3OUT = 0x00;
    P4OUT = 0x00;
    P5OUT = 0x00;
    P6OUT = 0x00;

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