ATtiny84 Atmel Corporation, ATtiny84 Datasheet - Page 186

• Manufacturer Part Number: ATtiny84
• Manufacturer: Atmel Corporation

Specifications of ATtiny84

• Flash (kbytes): 8 Kbytes
• Pin Count: 14
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 6
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 12
• Ext Interrupts: 12
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

21.1.1
21.2
186
Active Supply Current
ATtiny24/44/84
Example
Table 21-2.
Calculate the expected current consumption in idle mode with USI, TIMER0, and ADC enabled
at V
add 6.1% for the USI, 10.4% for TIMER0, and 28.8% for the ADC. Reading from
page 189
total current consumption in idle mode with USI, TIMER0, and ADC enabled is therefore:
Figure 21-1. Active Supply Current vs. Low Frequency (0.1 - 1.0 MHz)
I
CCTOT
PRR bit
PRTIM1
PRTIM0
PRUSI
PRADC
CC
= 2.0V and f = 1MHz. From
≈
0,04mA
, we find that current consumption in idle mode at 2V and 1MHz is about 0.04mA. The
1.2
0.8
0.6
0.4
0.2
1
0
0
Additional Current Consumption (percentage) in Active and Idle mode
×
(
1
Current consumption additional to
active mode with external clock
(see
+
0.1
0,061
Figure 21-1
0.2
+
0,104
0.3
Table 21-2 on page
+
1.8 %
2.3 %
1.4 %
6.7 %
ACTIVE SUPPLY CURRENT vs. LOW FREQUENCY
and
0,288
Figure
0.4
)
Frequency (MHz)
≈
0,06mA
21-2)
0.5
(PRR=0xFF)
0.6
186, third column, we see that we need to
Current consumption additional to
idle mode with external clock
(see
0.7
Figure 21-6
0.8
0.9
10.4 %
28.8 %
8.0 %
6.1 %
and
Figure
1
5.5 V
5.0 V
4.5 V
4.0 V
3.3 V
2.7 V
1.8 V
8006K–AVR–10/10
Figure 21-6 on
21-7)