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AN4635 датащи(PDF) 26 Page - STMicroelectronics |
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AN4635 датащи(HTML) 26 Page - STMicroelectronics |
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26 / 34 page ![]() Power consumption comparison AN4635 26/34 DocID027290 Rev 1 Note: The timing is slightly different for the 2 cases. This is a common problem when MSI is used to clock the LPUART peripheral. MSI clock is generally less precise than LSE or even HSI. 6.10 Wakeup from Stop mode on HSI Another option to use with higher communication speed is to exploit the feature of wakeup from Stop mode with peripheral being clocked from the HSI clock (see Figure 11). The HSI oscillator draws approximately as much current in combination with the Stop mode as the MSI at 2 MHz requires in Sleep mode. It is however more precise and with provides the core with more processing power in run mode. Voltage regulator Range 1 AHB/APB ratio 1/1 ULP/FWU +/+ Baud rate 57600 SW used Interrupt operation (Com IT) modified with USART on SYSCLK Interrupt operation (Com IT) modified with LPUART on SYSCLK Table 12. Configurations - Higher communication speed (continued) Curve in Figure 10 Black Red |
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