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傾”芯”,不恨晚——NUCLEO-F446RE評(píng)測(cè)

  • 作者:Aries
  • 來源:21ic
  • [導(dǎo)讀]
  • F446RE作為一顆市用度很高的芯,還需要來評(píng)測(cè)嗎?市面上已經(jīng)有了Nucleo-F446ZE,那Nucleo-F446RE是不是就落伍了?本文作者并不這么看,傾“芯”,不恨晚~通過本文中的跑分、功耗和精度等測(cè)試,你或許會(huì)對(duì)它有更加深刻地認(rèn)識(shí)。

(2)功耗測(cè)試

功耗測(cè)試是不可或缺的測(cè)試,現(xiàn)在的MCU都要強(qiáng)調(diào)低功耗。

- Sleep Mode

運(yùn)行狀態(tài):

- 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

 

實(shí)測(cè)數(shù)據(jù)跟官方的差幾個(gè)毫安,有點(diǎn)偏差。

31.jpg

 

- STOP Mode

運(yùn)行狀態(tài):

- 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

 

這個(gè)模式下測(cè)到的數(shù)據(jù)跟官方的有點(diǎn)差距了。

33.jpg

 

- Under Drive STOP Mode

運(yùn)行狀態(tài):

- 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

 

同樣這組數(shù)據(jù)差距也比較大。

35.jpg

 

- STANDBY Mode

運(yùn)行狀態(tài):

- 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)

36.jpg

 

測(cè)量的結(jié)果跟官方標(biāo)稱的相差不大。

37.jpg

 

- STANDBY Mode with RTC clocked by LSI

運(yùn)行狀態(tài):

- 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

 

測(cè)試結(jié)果也差不多,跟官方的相差不會(huì)太大。

39.jpg

 

-STANDBY Mode with RTC clocked by LSI and BKPSRAM

運(yùn)行狀態(tài):

- RTC Clocked by LSI

- Backup SRAM ON

- IWDG OFF

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