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Can a SPI controller and ADC output at the same time?
Since SPI is a full-duplex interface, both the controller and ADC can output data at the same time via the MOSI/DIN and MISO/DOUT lines, respectively. The controller SPI interface provides the user with flexibility to select the rising or falling edge of the clock to sample and/or shift the data.
Why is SPI more popular than parallel interfaces?
The controllers write or read ADC internal registers and read conversion codes. SPI is becoming more and more popular due to its simple printed circuit board (PCB) routing and a faster clock rate compared to parallel interface.
What does SPI stand for in Analog Devices?
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. SPI is a synchronous, full duplex master-slave-based interface.
How does MCU SPI connect to an ADC node?
Figure 2 shows a typical 4-wire MCU SPI interface connection. Figure 2. Standard MCU SPI connection to an ADC node. To begin SPI communication, the controller must send the clock signal and select the ADC by enabling the CS signal, which is usually an active low signal.
How does the SPI interface work on a clock?
The SPI interface provides the user with flexibility to select the rising or falling edge of the clock to sample and/or shift the data. Please refer to the device data sheet to determine the number of data bits transmitted using the SPI interface. In SPI, the master can select the clock polarity and clock phase.
What’s the maximum clock speed of an ADC port?
Unless otherwise specified, the maximum clock speed of the ADC SPI port is 25 MHz. See the specific product data sheet for more information pertaining to SPI spe eds supported for a particular device. The typical hold time (t DH ) is 0 ns, and a minimum setup time (t