ATtiny25 Automotive Atmel Corporation, ATtiny25 Automotive Datasheet - Page 160

• Manufacturer Part Number: ATtiny25 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATtiny25 Automotive

• Flash (kbytes): 2 Kbytes
• Pin Count: 8
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 4
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 6
• Ext Interrupts: 6
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 4
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.12
• Eeprom (bytes): 128
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 5
• Pwm Channels: 6
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

23.2.1
23.2.1.1
160
ATtiny25/45/85
Using the Power Reduction Register
Example 1
The tables and formulas below can be used to calculate the additional current consumption for
the different I/O modules in Active and Idle mode. The enabling or disabling of the I/O modules
are controlled by the Power Reduction Register. See
details.
Table 23-1.
Table 23-2.
It is possible to calculate the typical current consumption based on the numbers from Table 2 for
other V
Calculate the expected current consumption in idle mode with USI, TIMER0, and ADC enabled
at V
for the USI, 7.3% for the TIMER0 module, and 21.4% for the ADC module. Reading from
23-9, we find that the idle current consumption is ~0,25mA at V
total current consumption in idle mode with USI, TIMER0, and ADC enabled, gives:
I
CC
PRR bit
PRTIM1
PRTIM0
PRUSI
PRADC
PRR bit
PRTIM1
PRTIM0
PRUSI
PRADC
total
CC
= 2.0V and F = 1MHz. From
CC
0,25 mA
and frequency settings than listed in Table 1.
Additional Current Consumption for the different I/O modules (absolute values)
Additional Current Consumption (percentage) in Active and Idle mode
Typical numbers
Additional Current consumption
compared to Active with external
clock
(see
1
V
+
CC
0,064
Figure 23-1
= 2V, F = 1MHz
5.0 uA
4.0 uA
43 uA
13 uA
+
0,073
17.3%
1.8 %
1.6 %
5.4 %
and
Table
+
0,214
Figure
23-2, third column, we see that we need to add 6.4%
23-2)
0,337mA
V
CC
= 3V, F = 4MHz
“Power Reduction Register” on page 33
270 uA
28 uA
25 uA
84 uA
Additional Current consumption
compared to Idle with external clock
(see
Figure 23-6
CC
= 3.0V and F = 1MHz. The
68.4 %
21.4 %
V
7.3 %
6.4 %
and
CC
= 5V, F = 8MHz
Figure
1090 uA
116 uA
102 uA
351 uA
7598H–AVR–07/09
23-7)
Figure
for