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倾”芯”,不恨晚——NUCLEO-F446RE评测

ST   Nucleo系列   开发板   
  • 作者:Aries
  • 来源:21ic
  • [导读]
  • F446RE作为一颗市用度很高的芯,还需要来评测吗?市面上已经有了Nucleo-F446ZE,那Nucleo-F446RE是不是就落伍了?本文作者并不这么看,倾“芯”,不恨晚~通过本文中的跑分、功耗和精度等测试,你或许会对它有更加深刻地认识。

(2)功耗测试

功耗测试是不可或缺的测试,现在的MCU都要强调低功耗。

- Sleep Mode

运行状态:

- System Running at PLL (180MHz)

- Flash 5 wait state

- Instruction and Data caches ON

- Prefetch OFF

- Code running from Internal FLASH

- All peripherals disabled

- Wakeup using EXTI Line (User Button PC.13)

30.jpg

 

实测数据跟官方的差几个毫安,有点偏差。

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- STOP Mode

运行状态:

- RTC Clocked by LSI

- Regulator in LP mode

- HSI, HSE OFF and LSI if not used as RTC Clock source

- No IWDG

- FLASH in deep power down mode

- Automatic Wakeup using RTC clocked by LSI (after ~20s)

32.jpg

 

这个模式下测到的数据跟官方的有点差距了。

33.jpg

 

- Under Drive STOP Mode

运行状态:

- RTC Clocked by LSI

- Regulator in LP mode

- Under drive feature enabled

- HSI, HSE OFF and LSI if not used as RTC Clock source

- No IWDG

- FLASH in deep power down mode

- Automatic Wakeup using RTC clocked by LSI (after ~20s)

34.jpg

 

同样这组数据差距也比较大。

35.jpg

 

- STANDBY Mode

运行状态:

- Backup SRAM and RTC OFF

- IWDG and LSI OFF

- Wakeup using WakeUp Pin (PA.00) by connecting PA0 (pin 28 in CN7 connector) to 3.3V (pin 4 in CN6 connector)

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测量的结果跟官方标称的相差不大。

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- STANDBY Mode with RTC clocked by LSI

运行状态:

- RTC Clocked by LSI

- IWDG OFF and LSI OFF if not used as RTC Clock source

- Backup SRAM OFF

- Automatic Wakeup using RTC clocked by LSI (after ~20s)

38.jpg

 

测试结果也差不多,跟官方的相差不会太大。

39.jpg

 

-STANDBY Mode with RTC clocked by LSI and BKPSRAM

运行状态:

- RTC Clocked by LSI

- Backup SRAM ON

- IWDG OFF

  • 本文系21ic原创,未经许可禁止转载!

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