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cc3200 uart pin numbers

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Can some one help me to understand what is the pin number for Serial. port when used in BP (non-flash mode) 

The doc says it's P03 (Tx ) and P04 (Rx)  but looks like the value are showing always ZERO


BTW, I tried with Serial1.  and it works perfectly for the same sketch.


My Sketch 







#define LED RED_LED
char ch;
void setup()
//  Serial1.begin(9600); // Working
  // put your setup code here, to run once:
void loop()
  // Serial1.write('A'); // Working
Serial.write('A') ; // NOT working - GPIO P03, P04 (Tx, RX)
  // put your main code here, to run repeatedly:


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