Assume that the ANI pin of a PIC18 running with a 4 MHz crystal oscillator is...

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Assume that the ANI pin of a PIC18 running with a 4 MHz crystal oscillator is connected to a potentiometer. The VDD of the system is (i) The power supply of the PIC is Vcc-5 Vand Vss=0. (1) The voltage ranges of the potentiometers are from 0 V to 3V. (ii) The reference external sources are used. (iii) The voltage is applied to the ANI pin. (iv) The voltage is measured with 8-bit. (v) Let the minimum value of TAD= 1.9 us and the minimum value of TAQ-7 μs (a) Write a program to measure the voltages applied to the ANI pin, convert it, and retrieved the conversion result and place it in RAM location 10H. Show the steps to determine the values of ADCONO, ADCON1 and ADCON2. (12 marks) (b) Suppose the measured bit value is 1100 0000, what is the measured voltage value? (3 marks) 87 1 (AN2) sal alle met TVAN) 6-Yan 0000 1001 3010 2003 1100 1101 17 1110 Hu 1.5 06 • VERGLACFO Velgener liga Table 12.3 PCFCCICS A/D por cgat b VCFG VERGO PCTG) PCTG: PCPGI PCFOR Vas Veupe DOP Contige Se CDDDDDDDD <DDDDDD * BS ADCONI 84 063 BY VERGE VOTOS PCTGS PCTGE PIGEPCTGR U ADCONO M ST121 0000Channel (ANG) 0001 Channel 1 (ANT) C162 CHST 068 Chanel Select 1100-Channel 12 (AN12) HO 12 111 GO DONE ADON 80 1-A/D Power Up 0-A/0 Shtol 1-Set to Start Conversion disset at the End of Comenion N7 8C MEM Ca Kig fed ADCON2 Reading 1a Jed NI ACOT ACUT ACOTO ABGRRADESH ADER) Nation Time Chick Select B Sele NI ACQTZ ACQTO: A 000-0TAD(1) 001-2 TAD 010-4 TAD 011-6 TAD ADCS2 ADCSO A/D conversion clock select bits 000-FOSC/2 001-FOSC/8 010-FOSC/32 100-STAD 101-12 TAD 110-16 TAD 111-20 TAD See Table 12:2 011-FRC (clock derived from A/D RC oscillator) 100-FOSC/4 101-FOSC/16 110-FOSC/64 111-FRC (clock denived from A/DRC illater) Assume that the ANI pin of a PIC18 running with a 4 MHz crystal oscillator is connected to a potentiometer. The VDD of the system is (i) The power supply of the PIC is Vcc-5 Vand Vss=0. (1) The voltage ranges of the potentiometers are from 0 V to 3V. (ii) The reference external sources are used. (iii) The voltage is applied to the ANI pin. (iv) The voltage is measured with 8-bit. (v) Let the minimum value of TAD= 1.9 us and the minimum value of TAQ-7 μs (a) Write a program to measure the voltages applied to the ANI pin, convert it, and retrieved the conversion result and place it in RAM location 10H. Show the steps to determine the values of ADCONO, ADCON1 and ADCON2. (12 marks) (b) Suppose the measured bit value is 1100 0000, what is the measured voltage value? (3 marks) 87 1 (AN2) sal alle met TVAN) 6-Yan 0000 1001 3010 2003 1100 1101 17 1110 Hu 1.5 06 • VERGLACFO Velgener liga Table 12.3 PCFCCICS A/D por cgat b VCFG VERGO PCTG) PCTG: PCPGI PCFOR Vas Veupe DOP Contige Se CDDDDDDDD <DDDDDD * BS ADCONI 84 063 BY VERGE VOTOS PCTGS PCTGE PIGEPCTGR U ADCONO M ST121 0000Channel (ANG) 0001 Channel 1 (ANT) C162 CHST 068 Chanel Select 1100-Channel 12 (AN12) HO 12 111 GO DONE ADON 80 1-A/D Power Up 0-A/0 Shtol 1-Set to Start Conversion disset at the End of Comenion N7 8C MEM Ca Kig fed ADCON2 Reading 1a Jed NI ACOT ACUT ACOTO ABGRRADESH ADER) Nation Time Chick Select B Sele NI ACQTZ ACQTO: A 000-0TAD(1) 001-2 TAD 010-4 TAD 011-6 TAD ADCS2 ADCSO A/D conversion clock select bits 000-FOSC/2 001-FOSC/8 010-FOSC/32 100-STAD 101-12 TAD 110-16 TAD 111-20 TAD See Table 12:2 011-FRC (clock derived from A/D RC oscillator) 100-FOSC/4 101-FOSC/16 110-FOSC/64 111-FRC (clock denived from A/DRC illater)