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STM8AF/P6369 数据表(PDF) 81 Page - STMicroelectronics |
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STM8AF/P6369 数据表(HTML) 81 Page - STMicroelectronics |
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81 / 116 page  DocID031156 Rev 1 81/116 STM8AF6388 Electrical characteristics 114 10.3.9 SPI interface Unless otherwise specified, the parameters given in Table 39 are derived from tests performed under ambient temperature, fMASTER frequency, and VDD supply voltage conditions. tMASTER = 1/fMASTER. Refer to I/O port characteristics for more details on the input/output alternate function characteristics (NSS, SCK, MOSI, MISO). Table 39. SPI characteristics Symbol Parameter Conditions Min Max Unit fSCK 1/tc(SCK) SPI clock frequency Master mode 0 10 MHz Slave mode VDD < 4.5 V 0 6(1) VDD = 4.5 V to 5.5 V 0 8(1) tr(SCK) tf(SCK) SPI clock rise and fall time Capacitive load: C = 30 pF - 25(2) ns tsu(NSS)(3) NSS setup time Slave mode 4 * tMASTER - th(NSS)(3) NSS hold time Slave mode 70 - tw(SCKH)(3) tw(SCKL)(3) SCK high and low time Master mode tSCK/2 - 15 tSCK/2 + 15 tw(SCKH)(3) tw(SCKL)(3) tsu(MI)(3) tsu(SI)(3) Data input setup time Master mode 5 - Slave mode 5 - th(MI)(3) th(SI)(3) Data input hold time Master mode 7 - Slave mode 10 - ta(SO)(3)(4) Data output access time Slave mode - 3* tMASTER tdis(SO)(3)(5) Data output disable time Slave mode 25 tv(SO)(3) Data output valid time Slave mode (after enable edge) VDD < 4.5 V - 75 VDD = 4.5 V to 5.5 V - 53 tv(MO)(3) Data output valid time Master mode (after enable edge) - 30 th(SO)(3) Data output hold time Slave mode (after enable edge) 31 - th(MO)(3) Master mode (after enable edge) 12 - 1. fSCK < fMASTER/2. 2. The pad has to be configured accordingly (fast mode). 3. Guaranteed by design or by characterization results, not tested in production. 4. Min time is for the minimum time to drive the output and the max time is for the maximum time to validate the data. 5. 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. |
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