MSP-TS430PZ5X100: How to Setting External XT1?

Part Number: MSP-TS430PZ5X100
Other Parts Discussed in Thread: MSP430F5438A

Hi~

I want to use external clock XT1 on TS430PZ5X100.

The XT1 is 32,768Hz. 

I was setting XT1. But My code didn't work. What's the problems in my code?

First, This is problem

Second, This is my code.

1. Setting XIN, XOUT  (XT1)

GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P7, GPIO_PIN0);
GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P7, GPIO_PIN1);
GPIO_setAsInputPinWithPullUpResistor(GPIO_PORT_P7, GPIO_PIN0);

2. Setting Turn ON(XT1DRIVE, XCAP), BYPASS.

void initClock(void)
{
//Configure Core
PMM_setVCore(PMMCOREV_3);

UCS_setExternalClockSource(XT1CLKHZ, XT2CLKHZ);
UCS_turnOnLFXT1(XT1DRIVE_0, XCAP_3);
UCS_bypassXT1(UCS_XT1_LOW_FREQUENCY);

UCS_initClockSignal(UCS_ACLK, UCS_XT1CLK_SELECT, UCS_CLOCK_DIVIDER_1);

UCS_initClockSignal(UCS_FLLREF, UCS_XT1CLK_SELECT, UCS_CLOCK_DIVIDER_1);
UCS_initFLLSettle(MCLKDESIREDKHZ, MCLKXT1CLKRATIO);
}