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STM8S207MB 数据表(PDF) 77 Page - STMicroelectronics |
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STM8S207MB 数据表(HTML) 77 Page - STMicroelectronics |
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77 / 103 page  STM8S207xx, STM8S208xx Electrical characteristics Doc ID 14733 Rev 12 77/103 10.3.8 SPI serial peripheral interface Unless otherwise specified, the parameters given in Table 42 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 42. SPI characteristics Symbol Parameter Conditions Min Max Unit fSCK 1/tc(SCK) SPI clock frequency Master mode 0 10 MHz Slave mode 0 6 tr(SCK) tf(SCK) SPI clock rise and fall time Capacitive load: C = 30 pF 25 ns tsu(NSS) (1) NSS setup time Slave mode 4 x tMASTER th(NSS) (1) NSS hold time Slave mode 70 tw(SCKH) (1) tw(SCKL) (1) SCK high and low time Master mode tSCK/2 - 15 tSCK/2 + 15 tsu(MI) (1) tsu(SI) (1) Data input setup time Master mode 5 Slave mode 5 th(MI) (1) th(SI) (1) Data input hold time Master mode 7 Slave mode 10 ta(SO) (1)(2) Data output access time Slave mode 3 x tMASTER tdis(SO) (1)(3) Data output disable time Slave mode 25 tv(SO) (1) Data output valid time Slave mode (after enable edge) 75 tv(MO) (1) Data output valid time Master mode (after enable edge) 30 th(SO) (1) Data output hold time Slave mode (after enable edge) 31 th(MO) (1) Master mode (after enable edge) 12 1. Values based on design simulation and/or characterization results, and not tested in production. 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. 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. |
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