MSP430F5324: Getting incorrect output frequency using ACLK

Hello there,

In our project we are using the ACLK digitally out. We use 38KHz crystal for ACLK and using the following code to specify the ACLK,

            BIS.B   #BIT0,&P1DIR            ; ACLK set out to pins

            BIS.B   #BIT0,&P1SEL            ;

            BIS    #XT2OFF,UCSCTL6;                       // Set XT2 Off

            BIC    #XT1OFF,UCSCTL6;                       // Set XT1 On

            BIS    #XCAP_3,UCSCTL6;                       // choose the load cap

            BIS.B  #BIT4+BIT5,&P5SEL;                     // Port select XT1

When we probe the P1.0 by a logic analyzer we measure 32KHz (like the trimmed low-frequency oscillator (REFO),​) rather than 38KHz. Can you help us understand what we may be doing wrong to get the incorrect frequency out?

Thanks,

-Amanda