Техника микропроцессорных систем в коммутации. Проектирование микропроцессорных систем на базе микроконтроллеров AVR фирмы Atmel. Горохин В.Н. - 38 стр.

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ɢɦɟɟɬɫɹ ɜɨɡɦɨɠɧɨɫɬɶ ɩɨɞɤɥɸɱɚɬɶ ɤ ɜɯɨɞɭ «–» ɛɚɡɨɜɨɝɨ ɤɨɦɩɚɪɚɬɨɪɚ ɜɯɨɞɵ ɚɧɚ-
ɥɨɝɨ-ɰɢɮɪɨɜɨɝɨ ɩɪɟɨɛɪɚɡɨɜɚɬɟɥɹ ADC0...ADC7. ɉɨɞɤɥɸɱɟɧɢɟ ɜɵɩɨɥɧɹɟɬɫɹ ɩɪɢ
ɧɭɥɟɜɨɦ ɫɨɫɬɨɹɧɢɢ ɪɚɡɪɹɞɚ ADEN ɪɟɝɢɫɬɪɚ ADCSR (ʋ $06) ɢ ɟɞɢɧɢɱɧɨɦ
ɫɨɫɬɨɹɧɢɢ ɪɚɡɪɹɞɚ ACME ɪɟɝɢɫɬɪɚ SFIOR (ʋ $30). ȼɵɛɨɪ ɩɨɞɤɥɸɱɚɟɦɨɝɨ ɜɯɨ-
ɞɚ ɨɩɪɟɞɟɥɹɟɬɫɹ ɤɨɦɛɢɧɚɰɢɟɣ ɫɨɫɬɨɹɧɢɣ ɪɚɡɪɹɞɨɜ MUX2, MUX1 ɢ MUX0
ɪɟɝɢɫɬɪɚ ADMUX (ʋ $07).
ȼɬɚɛɥ. 32 ɭɤɚɡɚɧɵ ɜɵɜɨɞɵ ɦɢɤɪɨɤɨɧɬɪɨɥɥɟɪɚ, ɢɫɩɨɥɶɡɭɟɦɵɟ ɜ ɤɚɱɟɫɬɜɟ
ɜɯɨɞɨɜ AIN0 ɢ AIN1, ɭ ɦɢɤɪɨɤɨɧɬɪɨɥɥɟɪɨɜ ɪɚɡɧɵɯ ɬɢɩɨɜ.
Ɍɚɛɥɢɰɚ 32. ȼɯɨɞɵ AIN0 ɢ AIN1
ȼɯɨɞ t11 t12 t15 t28 1200
2313
4433 8515
8535
m163 m103*
AIN0 Ɋȼ0 Ɋȼ0 Ɋȼ0 PD6 Ɋȼ2 Ɋȼ2 Ɋȿ2
AIN1 Ɋȼ1 Ɋȼ1 Ɋȼ1 PD7 ɊȼɁ ɊȼɁ ɊȿɁ
* — Ⱥɋ+, AC–
ɋɯɟɦɚ ɤɨɦɩɚɪɚɬɨɪɚ ɦɢɤɪɨɤɨɧɬɪɨɥɥɟɪɚ ȺɌɬɟgɚ16 ɩɪɢɜɟɞɟɧɚ ɧɚ ɪɢɫ. 28.
Ɋɢɫ. 28. Ɏɭɧɤɰɢɨɧɚɥɶɧɚɹ ɫɯɟɦɚ ɚɧɚɥɨɝɨɜɨɝɨ ɤɨɦɩɚɪɚɬɨɪɚ
ȼ ɪɚɛɨɬɟ ɤɨɦɩɚɪɚɬɨɪɚ ɢɫɩɨɥɶɡɭɸɬɫɹ ɪɟɝɢɫɬɪɵ (ɪɢɫ. 29):
0
Ɋɟɝɢɫɬɪ ɭɩɪɚɜɥɟɧɢɹ ɚɧɚɥɨɝɨɜɵɦ ɤɨɦɩɚɪɚɬɨɪɨɦ ACSR
0
Ɋɟɝɢɫɬɪ ɫɩɟɰɢɚɥɶɧɵɯ ɮɭɧɤɰɢɣ ɜɜɨɞɚ/ɜɵɜɨɞɚ
0
Ɋɟɝɢɫɬɪ ɫɨɫɬɨɹɧɢɹ ɚɧɚɥɨɝɨ-ɰɢɮɪɨɜɨɝɨ ɩɪɟɨɛɪɚɡɨɜɚɬɟɥɹ
0
Ɋɟɝɢɫɬɪ ɦɭɥɶɬɢɩɥɟɤɫɨɪɚ ɚɧɚɥɨɝɨ-ɰɢɮɪɨɜɨɝɨ ɩɪɟɨɛɪɚɡɨɜɚɬɟɥɹ AD-
CMUX
0
Ɋɟɝɢɫɬɪ ɫɨɫɬɨɹɧɢɹ ɦɢɤɪɨɤɨɧɬɪɨɥɥɟɪɚ SREG.
Ɋɢɫ. 29. Ɋɟɝɢɫɬɪɵ, ɡɚɞɟɣɫɬɜɨɜɚɧɧɵɟ ɜ ɪɚɛɨɬɟ ɚɧɚɥɨɝɨɜɨɝɨ ɤɨɦɩɚɪɚɬɨɪɚ
76
Ɋɟɝɢɫɬɪ ACSR ɩɪɟɞɧɚɡɧɚɱɟɧ ɞɥɹ ɭɩɪɚɜɥɟɧɢɹ ɚɧɚɥɨɝɨɜɵɦ ɤɨɦɩɚɪɚɬɨɪɨɦ.
0
Ȼɢɬ 7 – ACD – ɨɬɤɥɸɱɚɟɬ ɚɧɚɥɨɝɨɜɵɣ ɤɨɦɩɚɪɚɬɨɪ.
0
Ȼɢɬ 6 – ACBG – ɜɵɛɨɪ ɷɬɚɥɨɧɚ ɚɧɚɥɨɝɨɜɨɝɨ ɤɨɦɩɚɪɚɬɨɪɚ.
0
Ȼɢɬ 5 – ACO – ɜɵɯɨɞ ɚɧɚɥɨɝɨɜɨɝɨ ɤɨɦɩɚɪɚɬɨɪɚ.
0
Ȼɢɬ 4 – ACI – ɮɥɚɝ ɩɪɟɪɵɜɚɧɢɹ ɩɨ ɚɧɚɥɨɝɨɜɨɦɭ ɤɨɦɩɚɪɚɬɨɪɭ.
0
Ȼɢɬ 3 – ACIE – ɪɚɡɪɟɲɟɧɢɟ ɩɪɟɪɵɜɚɧɢɹ ɩɨ ɚɧɚɥɨɝɨɜɨɦɭ ɤɨɦɩɚɪɚɬɨɪɭ.
0
Ȼɢɬ 2 – ACIC – ɪɚɡɪɟɲɟɧɢɟ ɜɯɨɞɚ ɡɚɯɜɚɬɚ ɚɧɚɥɨɝɨɜɨɝɨ ɤɨɦɩɚɪɚɬɨɪɚ.
0
Ȼɢɬɵ 1,0 – ACIS1, ACIS0 – ɜɵɛɨɪ ɪɟɠɢɦɚ ɩɪɟɪɵɜɚɧɢɹ ɩɨ ɚɧɚɥɨɝɨɜɨɦɭ
ɤɨɦɩɚɪɚɬɨɪɭ. ȼɚɪɢɚɧɬɵ ɭɫɬɚɧɨɜɨɤ ɩɨɤɚɡɚɧɵ ɜ ɬɚɛɥɢɰɟ 33.
Ɍɚɛɥɢɰɚ 33. ɍɫɬɚɧɨɜɤɢ ɛɢɬɨɜ ACIS1/ACIS0
A A Ɋɟɠɢɦ ɩɪɟɪɵɜɚɧɢɹ
0 0 ɉ
ɪ
ɟ
ɪ
ɵɜɚɧɢɟ ɩɨ ɩɟ
ɪ
ɟɤɥɸɱɟɧɢɸ ɜɵɯɨɞɚ ɤɨɦɩɚ
ɪ
ɚɬɨ
ɪ
ɚ
1 0 Ɂɚ
ɪ
ɟɡɟ
ɪ
ɜɢ
ɪ
ɨɜɚɧɨ
1 0 ɉ
ɪ
ɟ
ɪ
ɵɜɚɧɢɟ ɩɨ ɩɚɞɚɸɳɟɦ
ɭɮɪ
ɨɧɬ
ɭ
ɧɚ ɜɵɯɨɞɟ ɤɨɦɩɚ
ɪ
ɚɬɨ
ɪ
ɚ
1 1 ɉɪɟɪɵɜɚɧɢɟ ɩɨ ɧɚɪɚɫɬɚɸɳɟɦɭ ɮɪɨɧɬɭ ɧɚ ɜɵɯɨɞɟ ɤɨɦɩɚɪɚɬɨɪɚ
ɉɪɢ ɢɡɦɟɧɟɧɢɢ ɫɨɫɬɨɹɧɢɹ ɛɢɬɨɜ ACIS1/ACIS0 ɩɪɟɪɵɜɚɧɢɟ ɩɨ ɚɧɚɥɨɝɨɜɨ-
ɦɭ ɤɨɦɩɚɪɚɬɨɪɭ ɞɨɥɠɧɨ ɛɵɬɶ ɡɚɩɪɟɳɟɧɨ ɨɱɢɫɬɤɨɣ ɛɢɬɚ ɪɚɡɪɟɲɟɧɢɹ ɩɪɟɪɵɜɚ-
ɧɢɹ ɜ ɪɟɝɢɫɬɪɟ ACSR. ȼ ɩɪɨɬɢɜɧɨɦ ɫɥɭɱɚɟ, ɩɪɢ ɢɡɦɟɧɟɧɢɢ ɫɨɫɬɨɹɧɢɹ ɛɢɬɨɜ
ɦɨɠɟɬ ɩɪɨɢɡɨɣɬɢ ɩɪɟɪɵɜɚɧɢɟ.
ɇɚ ɨɬɪɢɰɚɬɟɥɶɧɵɣ ɜɯɨɞ ɚɧɚɥɨɝɨɜɨɝɨ ɤɨɦɩɚɪɚɬɨɪɚ ɦɨɠɧɨ ɫɤɨɦɦɭɬɢɪɨɜɚɬɶ
ɥɸɛɨɣ ɢɡ ɜɯɨɞɨɜ ɩɨɪɬɚ PORTA (PA7 .. ɊȺ0). Ⱦɥɹ ɜɵɛɨɪɚ ɜɯɨɞɚ ɢɫɩɨɥɶɡɭɟɬɫɹ
ɦɭɥɶɬɢɩɥɟɤɫɨɪ ɚɧɚɥɨɝɨ-ɰɢɮɪɨɜɨɝɨ ɩɪɟɨɛɪɚɡɨɜɚɬɟɥɹ.
0
Ȼɢɬ ACME ɜ ɪɟɝɢɫɬɪɟ ɫɩɟɰɢɚɥɶɧɵɯ ɮɭɧɤɰɢɣ ɜɜɨɞɚ ɜɵɜɨɞɚ SFIOR ɩɪɟɞ-
ɧɚɡɧɚɱɟɧ ɞɥɹ ɩɨɞɤɥɸɱɟɧɢɹ ɦɭɥɶɬɢɩɥɟɤɫɨɪɚ ɤ ɚɧɚɥɨɝɨɜɨɦɭ ɤɨɦɩɚɪɚɬɨɪɭ.
0
Ȼɢɬɚɦɢ MUX2..0 ɜ ɪɟɝɢɫɬɪɟ ɦɭɥɶɬɢɩɥɟɤɫɨɪɚ ADMUX ɜɵɛɢɪɚɟɬɫɹ ɤɨɧ-
ɬɚɤɬ ɧɚ ɜɯɨɞɟ (ɬɚɛɥ. 34).
Ɍɚɛɥɢɰɚ 34. Ʌɨɝɢɤɚ ɩɨɞɤɥɸɱɟɧɢɹ ɨɬɪɢɰɚɬɟɥɶɧɨɝɨ ɜɯɨɞɚ ɤɨɦɩɚɪɚɬɨɪɚ.
ACME ADEN MUX2..0 Ɉɬɪɢɰɚɬɟɥɶɧɵɣ ɜɯɨɞ ɚɧɚɥɨɝɨɜɨɝɨ ɤɨɦɩɚɪɚɬɨɪɚ
0
X XXX
AIN1
1 1
XXX
AIN1
1 0 000 ɊȺɈ
1 0 001 ɊȺ1
1 0 010 ɊȺ2
1 0 011 ɊȺɁ
1 0 100 ɊȺ4
1 0 101 ɊȺ5
1 0 110 ɊȺ6
1 0 111 ɊȺ7

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