C8051F的单片机调试时，在时钟初始化中 OSCICN = 0x88;语句出现问题

Question

单片机开发的新手，真心求助各位前辈
代码附在下面，遇到的问题是在用keil debug的时候，
OSCICN = 0x88;这句话会卡住很久，之后程序会被复位，无法往下进行
改成OSCICN = 0x08;以后debug运行到这一句就会自动退出调试界面

代码如下，用途是使用串口发一个编号：
#include

#include

#define BAUDRATE 9600
#define Fosc 22118400
#define uchar unsigned char
#define uint unsigned int

void Clock_Init(void)

{
int n = 0;
OSCXCN = 0x67;

for(n=0;n<500;n++);
while(!(OSCXCN&0x80))
OSCICN = 0x88;

}

void PORT_Init (void)

{

XBR0 = 0x05;        
XBR1 = 0x14;    
XBR2 = 0x44;      

}

void INT_Init (void)

{
TCON |= 0x05;

EX0 = 1;

EX1 = 1;

}

void MCU_Init()
{
EA = 0;

WDTCN = 0xDE;   
WDTCN = 0xAD;

Clock_Init();

PORT_Init();
INT_Init();

EA = 1; 

}

void delay(uint z)
{
uint x,y;
for(x=0;x<z;x++)
for(y=0;y<121;y++);
}

void UART0_Init(void)

{
SCON0 = 0x40;

T2CON = 0x30;
RCAP2H = (65536-Fosc/BAUDRATE/32)/256;

RCAP2L = (65536-Fosc/BAUDRATE/32)%256;

TI0 = 0;    
RI0 = 0;    
IE |= 0x90; 
IE &= 0x95; 
TR2 = 1;    

}

void send_char(uchar c)

{
SBUF0 = c;
while(TI0==0);

TI0 = 0;
delay(50);
}

void main (void)

{
int n0=48;

int n1=49;

int n3=51;

int i = 0;

MCU_Init();
UART0_Init();

TCON &=0xFD;        
delay(50);
send_char(n0);      
send_char(n0);  
send_char(n0);
send_char(n3);

}