时钟日历芯片NXP8563写字地址无应答，求教

void Send_Data(uchar ch)

{

  IICS_IICIF |= 1;

  IICD = ch;

  while(!IICS_IICIF);

}



void Wait_Ack(void)

{

  while(IICS_RXAK);

}



void main(void) {

  byte second = 0;

  byte i, temp;

  

  Init_MCG();

  IICF_MULT = 0b00;

      // 00 mul=1

  IICF_ICR = 0x1D;

      // 011101 ICR = 160

      // IIC baud rate is: 8M/(1*160)=50kb

  IICC1_IICEN |= 0b1;

  while(IICS_BUSY);

  // start IIC in master transmit mode

  IICC1 |= 0x30;

  while(!IICS_BUSY);

  Send_Data(0xa2);

  Wait_Ack();

  Send_Data(0x0);

  IICS_IICIF |= 1;

  Wait_Ack();

  IICS_IICIF |= 1;

  Send_Data(0x0);

  IICC1_RSTA |= 1;

  Send_Data(0xa3);

  Wait_Ack();

  IICC1_TX &= 0;

  IICD;

  for(i = 0; i < 16; ++i) {

    IICS_IICIF |= 1;

    second = IICD;

  }

  IICC1_MST &= 0;

  EnableInterrupts; /* enable interrupts */

  for(;;) {

    __RESET_WATCHDOG(); /* feeds the dog */

  } /* loop forever */

  /* please make sure that you never leave main */

}

/*

** MCG in PEE mode

** using external oscillator

** oscillator clock 16MHz

** bus system clock 8MHz

*/

void Init_MCG(void) 

{

  /* set system clock */

  MCGC2 = 0x36;

        // 00 BDIV divide-by-1

        // 1  RANGE high frequency range

        // 1  HGO external oscillator for high gain operation

        // 0

        // 1  EREFS a crystal is being used

        // 1  ERCLKEN ensure the external reference clock is active

        // 0

  while(!MCGSC_OSCINIT);

  MCGC1 = 0xB8;

        // 10 CLKS select external reference clock as system clock source

        // 111 RDIV divide-by-128

        // 0   IREFS select the external reference  clock

        // 00

  while(MCGSC_IREFST);

  while(MCGSC_CLKST != 0b10);

  MCGC1 = 0xA0;

  MCGC3 = 0x44;

        // 0

        // 1  PLLS  select the PLL

        // 0

        // 0

        // 0100  VDIV  multiply-by-16 1MHz reference * 16 = 16MHz

  while(!MCGSC_PLLST);

  while(!MCGSC_LOCK);

  MCGC1 = 0x20;

  while(MCGSC_CLKST != 0b11); 

}