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TMS320F28375DPZP bảng dữ liệu(PDF) 164 Page - Texas Instruments |
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TMS320F28375DPZP bảng dữ liệu(HTML) 164 Page - Texas Instruments |
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164 / 226 page ![]() The SPI operates in master or slave mode. The master initiates data transfer by sending the SPICLK signal. For both the slave and the master, data is shifted out of the shift registers on one edge of the SPICLK and latched into the shift register on the opposite SPICLK clock edge. If the CLOCK PHASE bit (SPICTL.3) is high, data is transmitted and received a half-cycle before the SPICLK transition. As a result, both controllers send and receive data simultaneously. The application software determines whether the data is meaningful or dummy data. There are three possible methods for data transmission: • Master sends data; slave sends dummy data • Master sends data; slave sends data • Master sends dummy data; slave sends data The master can initiate a data transfer at any time because it controls the SPICLK signal. The software, however, determines how the master detects when the slave is ready to broadcast data. Figure 8-71 shows the SPI CPU Interface. SPISIMO SPISOMI SPICLK SPISTE SPI Low-Speed Prescaler DMA PIE LSPCLK SYSCLK SYSRS SPIINT SPITXINT SPIRXDMA SPITXDMA CPU PCLKCR8 GPIO MUX Bit Clock Figure 8-71. SPI CPU Interface TMS320F28379D, TMS320F28379D-Q1, TMS320F28378D, TMS320F28377D TMS320F28377D-Q1, TMS320F28376D, TMS320F28375D, TMS320F28374D SPRS880O – DECEMBER 2013 – REVISED FEBRUARY 2021 www.ti.com 164 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: TMS320F28379D TMS320F28379D-Q1 TMS320F28378D TMS320F28377D TMS320F28377D-Q1 TMS320F28376D TMS320F28375D TMS320F28374D |
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