Question

1. Modify and put anything missing in the following assembly code section in order to make: The pins 0 and 1 of PORTB outputs. . All PORTA pins digital inputs, PORTB pins I &2 must have the logic value 1. Bet CLRF TRISB STATUSR BCF MOVLW b0000000 Moytw wHAod 17 Moy LW b'e0er MOVWF ANSELC MOVWE LATC Mb ANSEL MOVWF TRIe A MovwF TRIS A MOVLW I0100010" Mev MOVLN boeouo AOVWF PAT MOVWF TRISB it allows any com bination up to 31 calls and llo He interrap t to appen Te Pl work with tt stack 2. What is the STACK used for? Explain in detail n CAL or RECAL. STATUS,RPO BSF MOVLW O101e1ot END MOVWF TRISR 3. Write just the assembly code section to evaluate the sum of Μονιw οx48 ADD LW Ox26 Ox48 +0x26 ADDWF ADD literal to W ADD W to f ADDLW Syntax ADDLW k ftd Lal) Syntax ADOWF 4. Explain in detail what an INTERRUPT is. 5. What is the PCL register? What is used for? Or EKMple data re cieve Laad te vahe n te pregd5 ntemaptsed to eueble instant respouse to qny event egister duta vegister Counter used to 5 peL

Answer 1

CLRF TRISB ALT Port A MOV LW b^'0000010 MOV WF TRISA MOV LW b^' 0000110 MOV WF PORT B END. The stack allows any combination of upto 31 calls and allows the interrupt to happen. The PL work with the stack when CALL on RECALL. MOV LW 0 times 48 ADD LW 0 times 26 An Interrupt is used to enable instant response to any event, for example data receive. The PCL register is a data register used to load the value in the program counter.