...
#define TWI_READ        0x01    /* Data transfer direction READ */
...
#define RTL83X6_I2C_ADDR                0xA8
...
BOOL RTL83x6_Read(UINT16 addr, P_UINT16 pdata)
{    
      UINT8 lo, hi;
    INT i = 100;
      
    while(--i)
    {
        while(1)
        {      
            if(FALSE == TWI_Start() ||
               FALSE == TWI_Addr(RTL83X6_I2C_ADDR | TWI_READ) ||
               FALSE == TWI_Put(LOBYTE(addr)) ||
               FALSE == TWI_Put(HIBYTE(addr)) ||
               FALSE == TWI_Get(&lo, TRUE) ||
               FALSE == TWI_Get(&hi, TRUE))
                break;
            TWI_Stop();
            TC0_DelayMS(2);
            
            *pdata = MAKEUINT16(hi, lo);
            return TRUE;
        }
        TWI_Reset();
        TC0_DelayMS(5);
    }
      return FALSE;
}

/* Get ACK(NACK) */
    ClrSDA();
    Delay();
    SetSCL();
    Delay();
    i = RTL83X6_PIN & RTL83X6_SDA;
    ClrSCL();
    Delay();
    return i;