为什么89C52能用，STC15W204S不能用

nongqing

#include "reg52.h"

typedef unsigned int u16;
typedef unsigned char u8;
sbit led=P2^3;



void uart_init()
{
EA=1;
ES=1;
ET2=0;
T2CON=0x34;

TH2=0xFF;
TL2=0xDC;
RCAP2H=0xFF;
RCAP2L=0xDC;
SCON=0x50;
}

void uart()interrupt 4
{
u8 rece;
  RI=0;
rece=SBUF;

switch(rece)
{
case '0':led=0;break;
  case '1':led=1;break;
}
}

main()
{
uart_init();
while(1)
{
}
}