67.8.1 System Power Consumption in Applicative Use
Cases
Table 67-56 provides the processor power consumption in the
following conditions:
fCPU_CLK = 800 MHz
fMCK = 266 MHz
I & D caches enabled
External SDRAM memory: DDR3L operating at 266
MHz
Use cases are run on Linux
Current consumptions are measured according to
Figure 67-38. Note that external component
current consumptions are not counted. Either the 24-bit display or the 8-bit image
sensor is connected to the SAM9X7 Series device, but not both.
Table 67-55. Use Case Definition
Use Case
Description
1
After Linux boot root prompt
2
Running 2D graphics benchmark with EGT monitor (800x480 DSI panel @ 46 fps) - 22% CPU
usage
3
SAM9X70 running as iPerf server
4
Run Bonnie++ on USB mass storage
5
Image sensor video recording with QVGA resolution - 10 fps
Figure 67-38. Current Measurement for
Applicative Use Cases
Table 67-56. Current Consumption in Applicative
Use Cases at TA = 25°C
Power Input
Voltage Level (V)
Current Consumption vs Use Case (mA)
#1
#2
#3
#4
#5
VDD_3V3
3.30
50
38
50
35
100
VDDCORE
1.15
130
155
170
200
170
VDDIOM
1.35
20
32
70
30
39
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