MSP430F5529: 5529LP can't support the online debug with my MSP4305529 device

Yes, I am using the eZ-FET lite from the LP to program my MSP430f5529 device on a custom PC board.

when I debug this program as below, when the program exectue to  " UCSCTL4 |= SELS_5 + SELM_5;         ", I check the status of the P2DIR, P2SEL, P7DIR, P7SEL, I find they are "0x00".

 P2DIR |= BIT2;                            // SMCLK set out to pins
  P2SEL |= BIT2;                           
  P7DIR |= BIT7;                            // MCLK set out to pins
  P7SEL |= BIT7;
 
  P5SEL |= BIT2+BIT3;                       // Port select XT2

  UCSCTL6 &= ~XT2OFF;                       // Enable XT2
  UCSCTL6 &= 0xfff3;                        // Internal load cap
  UCSCTL3 |= SELREF_2;                      // FLLref = REFO
                                            // Since LFXT1 is not used,
                                            // sourcing FLL with LFXT1 can cause
                                            // XT1OFFG flag to set
  UCSCTL4 |= SELA_2;                        // ACLK=REFO,SMCLK=DCO,MCLK=DCO

  // Loop until XT1,XT2 & DCO stabilizes - in this case loop until XT2 settles
  do
  {
    UCSCTL7 &= ~(XT2OFFG + XT1LFOFFG + DCOFFG);
                                            // Clear XT2,XT1,DCO fault flags
    SFRIFG1 &= ~OFIFG;                      // Clear fault flags
  }while (SFRIFG1&OFIFG);                   // Test oscillator fault flag

  UCSCTL6 &= ~XT2DRIVE0;                    // Decrease XT2 Drive according to
                                            // expected frequency
  UCSCTL4 |= SELS_5 + SELM_5;               // SMCLK=MCLK=XT2

About " Are you able to program and debug the F5529 device that is soldered on the LaunchPad?", you are right. TKS

Yes, I am sure.