Which of the following statement is true with respect to SIM instruction:
1. SIM is used to set a mask for interrupt bits
2. SIM is used to check the status of pending interrupts
3. SIM is used to check data received on the serial data line
4. SIM is used to send data on the serial output data line
1
1 and 2
2
2 and 3
3
3 and 4
4
1 and 4