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參數(shù)資料
| 型號： | SB-36200IB351 |
| 廠商： | DATA DEVICE CORP |
| 元件分類： | 位置變換器 |
| 英文描述： | SYNCHRO OR RESOLVER TO DIGITAL CONVERTER, XMA |
| 文件頁數(shù)： | 1/11頁 |
| 文件大小： | 397K |
| 代理商： | SB-36200IB351 |
429
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
29.4.3
Supply current of I/O modules
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 ”PRR0 – Power Reduction Register 0” on
page 48 for details.
It is possible to calculate the typical current consumption based on the numbers from Table 29-8
on page 429 for other V
CC and frequency settings than listed in Table 29-7 on page 429.
Example
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
CC = 2.0V and F = 1MHz. From Table 29-8 on page 429, third column, we see that we need
to add 6.0% for the TIMER1, 14.8% for the ADC, and 10.3% for the SPI module. Reading from
Figure 29-153 on page 426, we find that the idle current consumption is ~0.078mA at V
CC = 2.0V
and F = 1MHz. The total current consumption in idle mode with TIMER1, ADC, and SPI enabled,
gives:
Table 29-7.
Additional current consumption for the different I/O modules (absolute values).
PRR bit
Typical numbers in
V
CC = 2V, F = 1MHz
V
CC = 3V, F = 4MHz
V
CC = 5V, F = 8MHz
PRUSART1
3.1A
21.5A
100.0A
PRUSART0
3.0A
21.0A
98.2A
PRTWI
6.4A
45.7A
214.5A
PRTIM2
5.6A
37.7A
165.8A
PRTIM1
3.6A
24.8A
107.0A
PRTIM0
1.7A
10.4A
43.2A
PRADC
11.8A
59.2A
257.0A
PRSPI
5.3A
40.1A
206.8A
Table 29-8.
Additional current consumption (percentage) in Active and Idle mode.
PRR bit
Additional current consumption
compared to Active with external
clock (see Figure 29-148 on page
424)
Additional current consumption
compared to Idle with external
clock (see Figure 29-153 on page
PRUSART1
1.4%
5.3%
PRUSART0
1.4%
5.2%
PRTWI
3.0%
11.3%
PRTIM2
2.5%
9.1%
PRTIM1
1.6%
6.0%
PRTIM0
0.7%
2.5%
PRADC
4.2%
14.8%
PRSPI
2.7%
10.3%
ICCtotal
0.078mA (1+ 0.060 + 0.148 + 0.103)
0.102mA
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