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What is faster I2C or SPI?
I2C is used only two wire for the communication, one wire is used for the data and the second wire is used for the clock. I2C is slower than SPI. In comparison to I2C, SPI is faster. I2C draws more power than SPI.
What is the difference between the I2C and SPI communication protocols?
I2C is half-duplex communication and SPI is full-duplex communication. I2C supports multi-master and multi slave and SPI supports single master. I2C is a two-wire protocol and SPI is a four-wire protocol. I2C supports clock stretching and SPI does not have clock stretching.
What is I2C interrupt?
As on some Kinetis device, when I2C module is working in slave state, it cannot generate an interrupt when it receives a STOP signal sent by the master. When the register address is 0xFF, the slave assumes it to be a STOP signal and passes the data to task.
What’s the difference between I2C and SPI protocols?
The most apparent difference between I2C and SPI is that I2C works as a 2-wire bus, needing only serial data (SDA) and serial clock (SCK) lines for data transmission and synchronization. SPI, on the other hand, requires four wires to control a single slave: SCK, master out slave in (MOSI), master in slave out (MISO), and slave select (SS). 2.
What’s the difference between UART and I2C SPI?
Summary UART I2C SPI Complexity Simple Easy to chain many devices. Complex as device increases Speed Slowest Faster than UART Fastest Number of devices Up to 2 devices Up to 127 but may get complex as devices Many, but there are practical limits and Number of wires 1 2 4
How many pins does an I2C address need?
I2C only needs two pins, but it’s slow and to handle it with or without interrupts is a pain, even with the build in peripheral modules. It’s a master/slave system, it’s good for controlling many slow devices like temp sensors. Only two lines for all bus devices, the selection is done via an I2C-Address in the protocol.
Which is faster, SPI or I2C or DMA?
SPI needs 3 (or 4 with CS) pins, it’s the fastest, simple to implement even with DMA, low cpu time overhead, often buffered. When you have enough free pins I would prefer it.