// put a single byte into our data memory
// if you remove the initialization (= 1) the
// location changes from 0x200 to 0x212
char var_1 = 1;  
 
void setup() {
  Serial.begin(9600);
  
  // print out its address, which is 16 bits unsigned 
  Serial.println( (uint16_t) &var_1, HEX);
}

void loop() {
}