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Государственный университет — учебно-научно-производственный комплекс (бывш. ОрелГТУ)

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Проектирование электронных средств

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Курсовые / ПЦиПУ. материалы для Курсового проекта Тютякин А.В. / КП_ПЦПУ / МК / ATmega32.pdf

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ATmega32A

28.10 Internal Oscillator Speed

Figure 28-34. Watchdog Oscillator Frequency vs. VCC

		WATCHDOG OSCILLATOR FREQUENCY vs. VCC
	1320
	1300						-40 °C
	1300						25 °C
							25 °C
	1280
	1260						85 °C
	1260
(kHz)	1240
(kHz)	1220
RC	1220
RC
F	1200
	1200
	1180
	1160
	1140
	1120
	2.5	3	3.5	4	4.5	5	5.5

VCC (V)

Figure 28-35. Calibrated 8 MHz RC Oscillator Frequency vs. Temperature

CALIBRATED 8 MHz RC OSCILLATOR FREQUENCY vs. TEMPERATURE

FRC (MHz)

8.5
8.5
8.3
8.3
8.1
8.1
7.9
7.9									5.5 V
									5.5 V
7.7									5.0 V
7.7									4.5 V
7.5									4.5 V

									4.0 V
									4.0 V
7.3
7.3									3.6 V
									3.6 V
7.1									3.3 V
7.1
6.9
6.9									2.7 V
6.7									2.7 V
6.7
6.5
6.5

-60	-40	-20	0	20	40	60	80	100
				Temperature

323

8155B–AVR–07/09

Figure 28-36. Calibrated 8 MHz RC Oscillator Frequency vs. VCC

		CALIBRATED 8 MHz RC OSCILLATOR FREQUENCY vs. VCC
	9
	8.5						-40 °C
							-40 °C
	8						25 °C
	8						85 °C
(MHz)							85 °C
(MHz)	7.5
RC
F
	7
	6.5
	6
	2.5	3	3.5	4	4.5	5	5.5

VCC (V)

Figure 28-37. Calibrated 8 MHz RC Oscillator Frequency vs. Osccal Value

	CALIBRATED 8 MHz RC OSCILLATOR FREQUENCY vs. OSCCAL VALUE
	16
	14																-40 °C
	14																25 °C
																	25 °C
	12																85 °C
(MHz)	10
(MHz)	8
RC
F	6
	6
	4
	2
	0
	0	16	32	48	64	80	96	112	128	144	160	176	192	208	224	240	256
								OSCCAL (X1)

324 ATmega32A

8155B–AVR–07/09

ATmega32A

Figure 28-38. Calibrated 4 MHz RC Oscillator Frequency vs. Temperature

CALIBRATED 4 MHz RC OSCILLATOR FREQUENCY vs. TEMPERATURE

FRC (MHz)

4.2
4.2
4.1
4.1
4
4								5.5 V
3.9								5.5 V

								5.0 V
								5.0 V
								4.5 V
3.8								4.0 V
3.8								3.6 V
								3.6 V
3.7								3.3 V
3.7								2.7 V
3.6								2.7 V
3.6
3.5
3.5
-60	-40	-20	0	20	40	60	80	100

Temperature

Figure 28-39. Calibrated 4 MHz RC Oscillator Frequency vs. VCC

		CALIBRATED 4 MHz RC OSCILLATOR FREQUENCY vs. VCC
	4.2
	4.1						-40 °C
	4						25 °C
	4
(MHz)	3.9						85 °C
	3.9

RC	3.8
F	3.8
F
	3.7
	3.6
	3.5
	2.5	3	3.5	4	4.5	5	5.5

VCC (V)

325

8155B–AVR–07/09

Figure 28-40. Calibrated 4 MHz RC Oscillator Frequency vs. Osccal Value

		CALIBRATED 4 MHz RC OSCILLATOR FREQUENCY vs. OSCCAL VALUE
	8																-40 °C
																	-40 °C
	7																25 °C
	6																85 °C
(MHz)	5
(MHz)	4
RC
F	3
	3
	2
	1
	0
	0	16	32	48	64	80	96	112	128	144	160	176	192	208	224	240	256
								OSCCAL (X1)

Figure 28-41. Calibrated 2 MHz RC Oscillator Frequency vs. Temperature

CALIBRATED 2 MHz RC OSCILLATOR FREQUENCY vs. TEMPERATURE

FRC (MHz)

2.1

2.05

								5.5 V
1.95								5.0 V
								4.5 V
1.9								4.0 V
1.9								3.6 V
								3.6 V
								3.3 V
1.85
1.85								2.7 V
								2.7 V
1.8
1.8
-60	-40	-20	0	20	40	60	80	100

Temperature

326 ATmega32A

8155B–AVR–07/09

ATmega32A

Figure 28-42. Calibrated 2 MHz RC Oscillator Frequency vs. VCC

		CALIBRATED 2 MHz RC OSCILLATOR FREQUENCY vs. VCC
	2.1
							-40 °C
	2						25 °C
	2
							85 °C
(MHz)	1.9
RC
F
	1.8
	1.7
	2.5	3	3.5	4	4.5	5	5.5

VCC (V)

Figure 28-43. Calibrated 2 MHz RC Oscillator Frequency vs. Osccal Value

	CALIBRATED 2 MHz RC OSCILLATOR FREQUENCY vs. OSCCAL VALUE
	4
	3.5																-40 °C
	3.5																25 °C
																	25 °C
	3																85 °C
(MHz)	2.5
(MHz)	2
RC
F	1.5
	1.5
	1
	0.5
	0
	0	16	32	48	64	80	96	112	128	144	160	176	192	208	224	240	256
								OSCCAL (X1)

327

8155B–AVR–07/09

Figure 28-44. Calibrated 1 MHz RC Oscillator Frequency vs. Temperature

CALIBRATED 1 MHz RC OSCILLATOR FREQUENCY vs. TEMPERATURE

FRC (MHz)

1.04

1.02

5.5 V

0.98

5.0 V

4.5 V

4.0 V

0.96

3.6 V

3.3 V

0.94

2.7 V

0.92

-60

-40

-20

100

Temperature

Figure 28-45. Calibrated 1 MHz RC Oscillator Frequency vs. VCC

		CALIBRATED 1 MHz RC OSCILLATOR FREQUENCY vs. VCC
	1.04
	1.02						-40 °C
							-40 °C
							25 °C
	1
(MHz)							85 °C
(MHz)	0.98
RC
F
	0.96
	0.94
	0.92
	2.5	3	3.5	4	4.5	5	5.5

VCC (V)

328 ATmega32A

8155B–AVR–07/09

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