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Московский государственный технический университет им. H.Э.Баумана

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Микропроцессорные устройства систем управления

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08 семестр / Разное / Скамко / inform / ATmega128.pdf

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ATmega128

Internal Oscillator Speed

Figure 191. Watchdog Oscillator Frequency vs. VCC

WATCHDOG OSCILLATOR FREQUENCY vs. VCC

	1220						-40	°C
							-40	°C
	1200						25	°C
	1180						85	°C
	1180
	1160
(kHz)	1140
RC
F
	1120
	1100
	1080
	1060
	2.5	3	3.5	4	4.5	5	5.5

VCC (V)

Figure 192. Calibrated 1 MHz RC Oscillator Frequency vs. Temperature

CALIBRATED 1MHz RC OSCILLATOR FREQUENCY vs. TEMPERATURE

	1.02
	1								5.5 V
									5.0 V
	0.98								4.5 V
(MHz)									4.0 V
(MHz)	0.96								3.6 V
RC									3.3 V
F
	0.94								2.7 V
									2.7 V
	0.92
	0.9
	-60	-40	-20	0	20	40	60	80	100
					Temperature

351

2467M–AVR–11/04

Figure 193. Calibrated 1 MHz RC Oscillator Frequency vs. VCC

CALIBRATED 1MHz RC OSCILLATOR FREQUENCY vs. Vcc

	1.02						-40	˚C
							-40	˚C
							25	˚C
	1						85	˚C
	0.98
(MHz)	0.96
RC
F
	0.94
	0.92
	0.9
	2.5	3	3.5	4	4.5	5	5.5

VCC (V)

Figure 194. 1 MHz RC Oscillator Frequency vs. Osccal Value

1MHz RC OSCILLATOR FREQUENCY vs. OSCCAL VALUE

	1.5																25 ˚C
	1.4																25 ˚C
	1.4
	1.3
	1.2
(MHz)	1.1
	1
	0.9
RC	0.9
F	0.8
	0.8
	0.7
	0.6
	0.5
	0.4
	0	16	32	48	64	80	96	112	128	144	160	176	192	208	224	240	256

OSCCAL VALUE

352 ATmega128

2467M–AVR–11/04

ATmega128

Figure 195. Calibrated 2 MHz RC Oscillator Frequency vs. Temperature

CALIBRATED 2MHz RC OSCILLATOR FREQUENCY vs. TEMPERATURE

	2.05
	2								5.5 V
									5.0 V
	1.95								4.5 V
(MHz)									4.5 V
									4.0 V
	1.9								3.6 V
RC									3.6 V
RC
F									3.3 V
	1.85								3.3 V
	1.85								2.7 V
									2.7 V
	1.8
	1.75
	-60	-40	-20	0	20	40	60	80	100
					Temperature

Figure 196. Calibrated 2 MHz RC Oscillator Frequency vs. VCC

CALIBRATED 2MHz RC OSCILLATOR FREQUENCY vs. Vcc

	2.05
							-40	˚C
							25	˚C
	2						85	˚C
							85	˚C
(MHz)	1.95
(MHz)
RC
F	1.9
	1.9
	1.85
	1.8
	2.5	3	3.5	4	4.5	5	5.5

VCC (V)

353

2467M–AVR–11/04

Figure 197. 2 MHz RC Oscillator Frequency vs. Osccal Value

2MHz RC OSCILLATOR FREQUENCY vs. OSCCAL VALUE

	4
	3.5																25 °C
	3
(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 VALUE

Figure 198. Calibrated 4 MHz RC Oscillator Frequency vs. Temperature

CALIBRATED 4MHz RC OSCILLATOR FREQUENCY vs. TEMPERATURE

	4.1
	4.05
	4
	3.95								5.5 V
	3.95								5.0 V
	3.9								5.0 V
(MHz)	3.9								4.5 V
									4.5 V
	3.85								4.0 V
RC									4.0 V
RC
F	3.8								3.6 V
	3.8								3.6 V
	3.75								3.3 V
	3.75
	3.7
	3.65								2.7 V
	3.6
	-60	-40	-20	0	20	40	60	80	100
					Temperature

354 ATmega128

2467M–AVR–11/04

ATmega128

Figure 199. Calibrated 4 MHz RC Oscillator Frequency vs. VCC

CALIBRATED 4MHz RC OSCILLATOR FREQUENCY vs. Vcc

	4.1
	4.05						-40 ˚C
	4.05
	4						25 ˚C
	4
	3.95						85 ˚C
	3.95
(MHz)	3.9
(MHz)	3.85
RC
F	3.8
	3.8
	3.75
	3.7
	3.65
	3.6
	2.5	3	3.5	4	4.5	5	5.5

VCC (V)

Figure 200. 4 MHz RC Oscillator Frequency vs. Osccal Value

4MHz RC OSCILLATOR FREQUENCY vs. OSCCAL VALUE

	9
	8															25 ˚C
																25 ˚C
	7
	6
(MHz)	5
(MHz)
RC	4
F
	3
	2
	1
	0
	0	16	32	48	64	80	96	112	128	144	160	176	192	208	224	240

OSCCAL VALUE

355

2467M–AVR–11/04

Figure 201. Calibrated 8 MHz RC Oscillator Frequency vs. Temperature

CALIBRATED 8MHz RC OSCILLATOR FREQUENCY vs. TEMPERATURE

	8.4
	8.2
	8
	7.8								5.5 V
	7.8
(MHz)	7.6								5.0 V
	7.6								4.5 V
									4.5 V
RC	7.4								4.0 V
F									4.0 V
	7.2								3.6 V
	7								3.3 V
	6.8								2.7 V
	6.8
	6.6
	-60	-40	-20	0	20	40	60	80	100
					Temperature

Figure 202. Calibrated 8 MHz RC Oscillator Frequency vs. VCC

CALIBRATED 8MHz RC OSCILLATOR FREQUENCY vs. Vcc

	8.4
	8.2						-40 ˚C
	8						25 ˚C
	8
	7.8						85 ˚C
	7.8
(MHz)	7.6
(MHz)
RC	7.4
F	7.4
F
	7.2
	7
	6.8
	6.6
	2.5	3	3.5	4	4.5	5	5.5

VCC (V)

356 ATmega128

2467M–AVR–11/04

ATmega128

Current Consumption of

Peripheral Units

Figure 203. 8 MHz RC Oscillator Frequency vs. Osccal Value

8MHz RC OSCILLATOR FREQUENCY vs. OSCCAL VALUE

	16
	14																25 °C
	14
	12
(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 VALUE

Figure 204. Brownout Detector Current vs. VCC

BROWNOUT DETECTOR CURRENT vs. VCC

25
20						-40	°C
						25	°C
15						85	°C
15
(uA)
CC
I
10
5
0
2.5	3	3.5	4	4.5	5	5.5

VCC (V)

357

2467M–AVR–11/04

Figure 205. ADC Current vs. VCC (ADC at 50 kHz

ADC CURRENT vs. VCC

ADC AT 50KHz

	600
	500						-40 °C
	500						25 °C
							25 °C
							85 °C
	400
(uA)	300
CC	300
CC
I
	200
	100
	0
	2.5	3	3.5	4	4.5	5	5.5

VCC (V)

Figure 206. ADC Current vs. VCC (ADC at 1 MHz)

AREF CURRENT vs. VCC

ADC AT 1MHz

250
200						25 °C
200						85 °C
						85 °C
						-40 °C
150
(uA)
CC
I
100
50
0
2.5	3	3.5	4	4.5	5	5.5

VCC (V)

358 ATmega128

2467M–AVR–11/04

ATmega128

Figure 207. Analog Comparator Current vs. VCC

ANALOG COMPARATOR CURRENT vs. VCC

	100						85 °C
	90						85 °C
	90						25 °C
	80						25 °C
	80						-40 °C
	70
(uA)	60
(uA)	50
CC	50
CC
I
	40
	30
	20
	10
	0
	2.5	3	3.5	4	4.5	5	5.5

VCC (V)

Figure 208. Programming Current vs. VCC

PROGRAMMING CURRENT vs. VCC

	9
	8						-40 ˚C
	8
	7						25 ˚C
							25 ˚C
	6						85 ˚C
							85 ˚C
(mA)	5
(mA)
CC	4
I	4
	3
	2
	1
	0
	2.5	3	3.5	4	4.5	5	5.5

VCC (V)

359

2467M–AVR–11/04

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