TDA4VH-Q1: Unable to bring MCU MCAN Transceivers out of Standby

Hi TI,

RTOS sdk : 9.1

I am using MCU domain MCAN channels MCU_MCAN0 and MCU_MCAN1. I am referring to file mcan_evm_loopback_app_main_k3.c for configuration.

void padConfig_prcmEnable()
{
    Board_STATUS boardStatus;
    I2C_Params      i2cParams;
    I2C_Handle      handle = NULL;
    uint8_t         dataToSlave[4];
    uint32_t regVal = 0U;
    
    /* GPIO initialization */
    GPIO_init();
    consolePrintf("GPIO_init Done \n");

    int pin_val = GPIOPinRead_v0(CSL_WKUP_GPIO0_BASE, MCU_MCAN1_STB_PIN);
    consolePrintf("MCU_MCAN1_STB_PIN : %d\n", pin_val);
 
    /* VEH ECU MCAN Module clock Enable*/
    Board_moduleClockEnable(TISCI_DEV_VEH_ECU_MCAN);
    /* DCM MCAN Module clock Enable*/
    Board_moduleClockEnable(TISCI_DEV_DCM_MCAN);
 
    /* Enable CAN transceivers by setting the STB pins */
    /* Set MCU_MCAN1_STB to LEVEL_LOW to exit CAN1 from Standby mode */
    GPIOSetDirMode_v0(CSL_WKUP_GPIO0_BASE, MCU_MCAN1_STB_PIN, GPIO_DIRECTION_OUTPUT);
    GPIOPinWrite_v0(CSL_WKUP_GPIO0_BASE, MCU_MCAN1_STB_PIN, GPIO_PIN_LOW);
 
    GPIOSetDirMode_v0(CSL_WKUP_GPIO0_BASE, MCU_MCAN0_STB_PIN, GPIO_DIRECTION_OUTPUT);
    GPIOPinWrite_v0(CSL_WKUP_GPIO0_BASE, MCU_MCAN0_STB_PIN, GPIO_PIN_LOW);
 
 
    /* Enable Main MCAN 2, GPIO0_127. */
    GPIO_write(1, GPIO_PIN_LOW);
    appLogPrintf("GPIO_write Done \n");

    #if 1
    /*readback*/
    /*Reading back standby pin for MCU MCAN0 and MCU MCAN1 */
    pin_val = GPIOPinRead_v0(CSL_WKUP_GPIO0_BASE, MCU_MCAN1_STB_PIN);
    consolePrintf("MCU_MCAN1_STB_PIN : %d\n", pin_val);
    #endif
}

What am I missing here? Why it is not able to write 0 to the pin? The configuration code looks similar to as given in the example file. Pls suggest.  

Thanks