Please help current consumption with uart

Other Parts Discussed in Thread: CC2540

Hello.

I'm trying to develop some device with cc2540.

I wrote down the UART driver that using usart1 (alt.1)

and I copied SPI driver that is included in ble stack (usart/spi alt2 with cma3000d)

But there's current consumption problem.

the init codes are below 

--- UART1 ---

void SetUART1(int mode){
  switch(mode){
  case ON:      
    PERCFG = 0x00;    
    
    U1CSR = 0x80;     // UART mode with idle status    
    U1GCR = 0x0B;     // LSB first    
    U1BAUD = 0xD8;    // BAUD 115,200    
    U1CSR |= 0x40;    // Enable Receive

//    P2DIR |= PIN6;    // Highest Priority for UART1 on Port0
      
  
    P0SEL |= (PIN4 | PIN5);   // Peripheral for RXD/TXD
    P0DIR &= ~PIN5;           // INPUT for RXD
        
    P0 |= (PIN3 | PIN4);      // Turn on Bluetooth Power

    break;
  case OFF:                
    PERCFG = 0x00;
    
    P0DIR |= PIN5;    
    P0INP |= (PIN4 | PIN5);
    P0SEL &= ~(PIN4 | PIN5);    
    
    U1CSR = 0x00;
    
    P0 &= ~(PIN3 | PIN4);
    break;
  default:
    break;
  }
}

--- SPI ---

void SetAcc(int mode){
  switch(mode)
  {
  case ON:  
    
      /*** Setup the CMA3000d interface ***/

    //*** Setup the SPI interface ***
    // SPI master mode
    
    U0CSR = 0x00;
    // Negative clock polarity, Phase: data out on CPOL -> CPOL-inv
    //                                 data in on CPOL-inv -> CPOL
    // MSB first
    U0GCR = 0x20;
    // SCK frequency = 480.5kHz (max 500kHz)
    U0GCR |= 0x0D;
    U0BAUD = 0xEC;   
    
    
    PERCFG = 0x01;
    
    P1INP &= ~(PIN2 | PIN3 | PIN4 | PIN5);
    P1SEL |= (PIN3 | PIN4 | PIN5);
    P1DIR &= ~(PIN4);

    CS = CS_DISABLED;
    
    P1 |= PIN1;
    
    uint8 readValue;
    accWriteReg(CTRL, RANGE_2G | MODE_100HZ_MEAS);
    WAIT_1_3US(80);
    do{
        accReadReg(STATUS, &readValue);
        WAIT_1_3US(80);
    }while(readValue & 0x08);

    
    break;
  case OFF:
    PERCFG = 0x00;
    
    P1INP |= (PIN2 | PIN3 | PIN4 | PIN5);
    P1SEL &= ~(PIN3 | PIN4 | PIN5);
    P1DIR |= PIN4;
    
    CS = 0;
    
    P1 &= ~PIN1;
    break;
  default:
    break;
  }
}

When I tried to enter the sleep mode, SPI interface turned off well.

But UART1 has problem. 

# Situation 1

If I don't set the high priority of uart1 on port0, uart1 doesn't works. tx is works but rx is not. even the interrupt doesn't comes

#Situation 2

If I set the high priority of port0 uart1 on port0, uart1 works fine. but when i tried to enter, current consumption is going up to 2.6mA.

Is there any problem in turn off routine of uart1 ?

sorry for my bad English. Please help me sirs.