Transcription of Serial Control Interface Standard (Rev 1.0)
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ADI-SPIT echnical SpecificationSerial Control Interface Standard (Rev ) ADI-SPI2 Rev Keywords SPI, SIF, Interface ADI-SPI3 Rev Contents 1 Scope .. 5 Compliance .. 5 2 References .. 5 3 Definitions, symbols and abbreviations .. 5 Definitions .. 5 Abbreviations .. 6 4 Physical Layer .. 6 General .. 6 Pins .. 6 CSB .. 6 SCLK .. 6 SDIO .. 6 SDO .. 6 Voltages and Interface Standards .. 7 Reference Configuration .. 7 Minimum configuration .. 7 Three wire bus .. 7 Four wire bus .. 8 Mixed bus .. 8 5 Data Link .. 8 General .. 8 Protocol .. 9 Instruction .. 9 Read/Write .. 9 Address .. 9 9 Single Byte 9 Streaming Bytes .. 10 Timing .. 10 Write Cycle .. 11 Read Cycle .. 11 Clock Domains.
The defined serial interface shall consist of SCLK, SDIO, CSB and SDO. 4.2.1 CSB CSB is the chip select, an active low signal that selects the slave device with which the master intends to communicate. Typically, there is a dedicated CSB between the master and each slave. CSB is always driven by the master.
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