首页 > 评测 > 倾”芯”,不恨晚——NUCLEO-F446RE评测
倾”芯”,不恨晚——NUCLEO-F446RE评测
- [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)
实测数据跟官方的差几个毫安,有点偏差。
- 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)
这个模式下测到的数据跟官方的有点差距了。
- 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)
同样这组数据差距也比较大。
- 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)
测量的结果跟官方标称的相差不大。
- 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)
测试结果也差不多,跟官方的相差不会太大。
-STANDBY Mode with RTC clocked by LSI and BKPSRAM
运行状态:
- RTC Clocked by LSI
- Backup SRAM ON
- IWDG OFF
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