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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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UM1871 датащи(PDF) 17 Page - STMicroelectronics |
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UM1871 датащи(HTML) 17 Page - STMicroelectronics |
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17 / 64 page  DocID027604 Rev 3 17/64 UM1871 Hardware layout and configuration 63 Note: I2C address of WM8994ECS/R is 0b0011010. 2.7 USB OTG FS STM32446E-EVAL evaluation board supports USB OTG full speed communication via a USB Micro-AB connector (CN9) and USB power switch (U6) connected to VBUS. The evaluation board can be powered by this USB connector (JP21 in position FS) at 5 V DC with 500 mA current limitation. A green LED LD5 will be lit in two conditions: • STM32446E-EVAL works as an USB host and power switch (U6) is ON • STM32446E-EVAL works as a USB device if VBUS is powered by another USB host A red LED LD5 will be lit when over-current is detected by the power switch U6. JP13 Digital microphone power source is connected to +3.3V power when JP13 is set as shown to the right (default setting): Digital microphone power source is connected to MICBIAS1 from WM8994ECS/R when JP13 is set as shown to the right: Table 6. Audio related jumpers (continued) Jumper Description Table 7. USB_OTG_FS related jumpers Jumper Description JP7 STM32F446 port PA9 is used as USART1_TX (in conjunction with JP6) when JP7 is set as shown below (see Warning): STM32F446 port PA9 is connected to USB_FS_VBUS when JP7 is set as shown below (see Warning): 4 3 2 1 4 3 2 1 |
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