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ST7DALIF2 数据表(PDF) 152 Page - STMicroelectronics |
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ST7DALIF2 数据表(HTML) 152 Page - STMicroelectronics |
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152 / 171 page ![]() Electrical characteristics ST7DALIF2 152/171 Figure 89. SPI slave timing diagram with CPHA=0 Note: 1 Measurement points are done at CMOS levels: 0.3xVDD and 0.7xVDD. 2 When no communication is on-going the data output line of the SPI (MOSI in master mode, MISO in slave mode) has its alternate function capability released. In this case, the pin status depends on the I/O port configuration. tsu(SS) (1) SS setup time (2) Slave (4 x TCPU) +150 ns th(SS) (1) SS hold time Slave 120 tw(SCKH) tw(SCKL) SCK high and low time Master Slave 100 90 tsu(MI) tsu(SI) Data input setup time Master Slave 100 100 th(MI) th(SI) Data input hold time Master Slave 100 100 ta(SO) Data output access time Slave 0 120 tdis(SO) Data output disable time Slave 240 tv(SO) Data output valid time Slave (after enable edge) 120 th(SO) Data output hold time 0 tv(MO) Data output valid time Master (after enable edge) 120 th(MO) Data output hold time 0 1. Data based on design simulation and/or characterisation results, not tested in production. 2. Depends on fCPU. For example, if fCPU = 8 MHz, then TCPU = 1/ fCPU = 125 ns and tSU(SS) = 550 ns Table 88. SPI characteristics (continued) Symbol Parameter Conditions Min Max Unit SS INPUT CPHA=0 MOSI INPUT MISO OUTPUT CPHA=0 tc(SCK) tw(SCKH) tw(SCKL) tr(SCK) tf(SCK) tv(SO) ta(SO) tsu(SI) th(SI) MSB OUT MSB IN BIT6 OUT LSB IN LSB OUT see note 2 CPOL=0 CPOL=1 tsu(SS) th(SS) tdis(SO) th(SO) see note 2 BIT1 IN |
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