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STM32F303VC 数据表(PDF) 98 Page - STMicroelectronics |
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STM32F303VC 数据表(HTML) 98 Page - STMicroelectronics |
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98 / 133 page ![]() Electrical characteristics STM32F302xx/STM32F303xx 98/133 Doc ID 023353 Rev 5 SPI/I2S characteristics Unless otherwise specified, the parameters given in Table 61 for SPI or in Table 62 for I2S are derived from tests performed under ambient temperature, fPCLKx frequency and VDD supply voltage conditions summarized in Table 22. Refer to Section 6.3.14: I/O port characteristics for more details on the input/output alternate function characteristics (NSS, SCK, MOSI, MISO for SPI and WS, CK, SD for I2S). Table 61. SPI characteristics Symbol Parameter Conditions Min Max Unit fSCK 1/tc(SCK) (1) SPI clock frequency Master mode - 18 MHz Slave mode - 18 tr(SCK) tf(SCK) (1) SPI clock rise and fall time Capacitive load: C = 30 pF - 8 ns DuCy(SCK)(1) SPI slave input clock duty cycle Slave mode 30 70 % tsu(NSS) (1) 1. Data based on characterization results, not tested in production. NSS setup time Slave mode 2Tpclk - ns th(NSS) (1) NSS hold time Slave mode 4Tpclk - tw(SCKH) (1) tw(SCKL) (1) SCK high and low time Master mode, fPCLK = 36 MHz, presc = 4 Tpclk/2 - 3 Tpclk/2 + 3 tsu(MI) (1) tsu(SI) (1) Data input setup time Master mode 5.5 - Slave mode 6.5 - th(MI) (1) Data input hold time Master mode 5 - th(SI) (1) Slave mode 5 - ta(SO) (1)(2) 2. Min time is for the minimum time to drive the output and the max time is for the maximum time to validate the data. Data output access time Slave mode, fPCLK = 24 MHz 0 4Tpclk tdis(SO) (1)(3) 3. Min time is for the minimum time to invalidate the output and the max time is for the maximum time to put the data in Hi-Z. Data output disable time Slave mode 0 24 tv(SO) (1) Data output valid time Slave mode (after enable edge) - 39 tv(MO) (1) Data output valid time Master mode (after enable edge) - 3 th(SO) (1) Data output hold time Slave mode (after enable edge) 15 - th(MO) (1) Master mode (after enable edge) 4 - |
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