TM4C123gh6pm PWM PC4 xds100v2 problem

Hi,

I'm trying to implement PWM module to my PCBA.

But there's a strange problem.

The pwm module work fine on TM4C123g lauchpad. (Stellaris In-Circuit)

But the same code on my PCBA would jump into Fault_ISR (via XDS100v2)

This function would lead to fault_ISR on my PCBA.

PWMGenConfigure(PWM0_BASE, PWM_GEN_3, (PWM_GEN_MODE_DOWN));

->HWREG(ui32Gen + PWM_O_X_CTL) = ((HWREG(ui32Gen + PWM_O_X_CTL) &
                                     ~(PWM_X_CTL_MODE | PWM_X_CTL_DEBUG |
                                       PWM_X_CTL_LATCH | PWM_X_CTL_MINFLTPER |
                                       PWM_X_CTL_FLTSRC |
                                       PWM_X_CTL_DBFALLUPD_M |
                                       PWM_X_CTL_DBRISEUPD_M |
                                       PWM_X_CTL_DBCTLUPD_M |
                                       PWM_X_CTL_GENBUPD_M |
                                       PWM_X_CTL_GENAUPD_M |
                                       PWM_X_CTL_LOADUPD | PWM_X_CTL_CMPAUPD |
                                       PWM_X_CTL_CMPBUPD)) | ui32Config);

 and the NVIC_Register shows like

Other peripheral modules works fine (i2c, smbus, can, timer)

The PWM initializtion code is

	SysCtlPWMClockSet(SYSCTL_PWMDIV_64);
	SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM0);
	SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC);
//    HWREG(GPIO_PORTC_BASE + GPIO_O_LOCK) = GPIO_LOCK_KEY_DD;
//    HWREG(GPIO_PORTC_BASE + GPIO_O_CR) |= 0xff;
	SysCtlDelay(10);
	GPIOPinConfigure(GPIO_PC4_M0PWM6);
	GPIOPinTypePWM(GPIO_PORTC_BASE, GPIO_PIN_4);

	uint32_t ui32PWMClock, PWM_FREQUENCY=64,ui32Load;
	ui32PWMClock = SysCtlClockGet() / 64;
	ui32Load = (ui32PWMClock / PWM_FREQUENCY) - 1;
	SysCtlDelay(10);

	PWMGenConfigure(PWM0_BASE, PWM_GEN_3, (PWM_GEN_MODE_DOWN));
	PWMGenPeriodSet(PWM0_BASE, PWM_GEN_3, ui32Load);
	PWMPulseWidthSet(PWM0_BASE, PWM_OUT_6, ui32Load / 2);
	PWMOutputState(PWM0_BASE, PWM_OUT_6_BIT, true);
	PWMGenEnable(PWM0_BASE, PWM_GEN_3);

I couldn't figure out how this happened.

Does anyone has the same or similar problem?

It would be great for any suggestion.

Regards