To begin SPI communication, the master must send the clock signal and select the slave by enabling the CS signal. Usually chip select is an active low signal hence, the master must send a logic 0 on this signal to select the slave. MOSI transmits data from the master to the slave and MISO transmits data from the slave to the master. In this article, the chip select signal is always an active low signal. When multiple slaves are used, an individual chip select signal for each slave is required from the master. This is normally an active low signal and is pulled high to disconnect the slave from the SPI bus. The chip select signal from the master is used to select the slave. Figure 1 shows the SPI connection between the master and the slave. SPI interfaces can have only one master and can have one or multiple slaves. Users should consult the product data sheet for the clock frequency specification of the SPI interface. SPI devices support much higher clock frequencies compared to I 2C interfaces. Data transmitted between the master and the slave is synchronized to the clock generated by the master. The device that generates the clock signal is called the master. SPI configuration with master and a slave. This article focuses on the popular 4-wire SPI interface. The SPI interface can be either 3-wire or 4-wire. Both master and slave can transmit data at the same time. The data from the master or the slave is synchronized on the rising or falling clock edge.
SLAVE MAKER 3 CONFIGURATION FULL
SPI is a synchronous, full duplex master-slave-based interface. This article provides a brief description of the SPI interface followed by an introduction to Analog Devices’ SPI enabled switches and muxes, and how they help reduce the number of digital GPIOs in system board design.
SLAVE MAKER 3 CONFIGURATION SERIAL
Serial peripheral interface (SPI) is one of the most widely used interfaces between microcontroller and peripheral ICs such as sensors, ADCs, DACs, shift registers, SRAM, and others.
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