58.8.2 System Power Consumption in Applicative Use Cases

Table 58-59 gives the processor power consumption in the following conditions:
  • fCPU_CLK = 600 MHz
  • fMCK = 200 MHz
  • I & D caches enabled
  • External SDRAM memory: 16-bit DDR2 operating at 200 MHz
  • Uses cases are run on Linux®
  • Current consumptions are measured according to figure Current Measurement Schematic for Applicative Use Cases. Note that external component current consumptions are not counted. Either the 24-bit display or the 8-bit image sensor is connected to the SAM9X60, but not both.
Table 58-58. Use Case Definition
Use Case Description of Test
1 After Linux boot root prompt
2 Video playback from USB mass storage (mp4 format, 480x272 @ 24fps, bitrate = 369 kbps)
3 Waveform (WAV) audio file decoding and playback on I2S. WAV file on USB mass storage
4 SAM9X60 running as iPerf server
5 Run Bonnie++ on USB mass storage
6 SAM9X60 running 2D graphic benchmark
7 Image sensor video recording with QVGA resolution - 10 fps

Figure 58-41. Current Measurement for Applicative Use Cases

Table 58-59. Power Consumption in Applicative Use Cases
Use Case VDDCORE (1.15V) VDDIOM (1.8V) VDDIN33 (3.3V) VDDNF (1.8V) VDDPIOP0 (3.3V) VDDPIOP1 (3.3V) Unit Total Power Unit
1 60.25 35.7 10 3.9 0.17 0.011 mA 174 mW
2 101 72.7 15.8 3.5 0.71 8.7 337
3 64 41.4 15.8 3.75 0.75 0.003 209
4 77.5 92.7 10 3.55 0.168 0.006 296
5 102 60 19.8 3.2 0.183 0.006 297
6 98 97 10 3.4 0.71 8.5 357
7 101 61.1 15.8 3.1 0.84 26 372