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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32MP151F датащи(PDF) 229 Page - STMicroelectronics |
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STM32MP151F датащи(HTML) 229 Page - STMicroelectronics |
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229 / 253 page  DS12501 Rev 3 229/253 STM32MP151C/F Electrical characteristics 232 6.3.37 USART interface characteristics Unless otherwise specified, the parameters given in Table 110 for USART are derived from tests performed under the ambient temperature, fHCLK frequency and VDD supply voltage conditions summarized in Table 110, with the following configuration: • Output speed is set to OSPEEDRy[1:0] = 10 • Capacitive load C = 30 pF • Measurement points are done at CMOS levels: 0.5×VDD Refer to Section 6.3.17: I/O port characteristics for more details on the input/output alternate function characteristics (NSS, CK, TX, RX for USART). 6.3.38 USB High-Speed PHY characteristics Table 110. USART characteristics(1) Symbol Parameter Conditions Min Typ Max Unit fCK USART clock frequency Master mode USART2,3,6 -- 12.5 MHz Master mode USART1 16.5 Slave mode - - 27 tsu(NSS) NSS setup time Slave mode tker+2 - - ns th(NSS) NSS hold time Slave mode 2 - - ns tw(CKH), tw(CKL) CK high and low time Master mode 1/fCK/2 - 1 1/fck/2 1/fCK/2 + 1 ns tsu(RX) Data input setup time Master mode tker+3 - - ns Slave mode 2 - - thRX) Data input hold time Master mode 1 - - ns Slave mode 1 - - tv(TX) Data output valid time Slave mode - 10 18 ns Master mode - 0.5 1 th(TX) Data output hold time Slave mode 8 - - ns Master mode 0 - - 1. 1.Guaranteed by characterization results. Table 111. USB High-Speed PHY characteristics(1) Symbol Parameter Conditions Min Typ Max Unit RREF Reference resistor on USB_RREF pin - 2.97 3.00 3.03 kΩ |
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