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How many slaves can be used in I2C?
“You have a 7-bit address. That means you can address up to 127 slaves.” “The number of devices connected to the bus is only limited by the total allowed bus capacitance of 400 pF.”
How many peripherals can be connected to I2C?
The I²C protocol is based on a 7-bit or a 10-bit address, though 7-bit addresses are more common. With a 7-bit protocol, you can connect up to 127 different peripherals to the bus.
What is multi master in CAN protocol?
A CAN bus is multi-master and automatically arbitration free. The whole point is that you don’t need a single master or main controller to take care of everything.
Can a slave device have more than one I2C address?
Some slave devices have few bits of the I2C address dependent on the level of address pins. This way it is possible to have on the same I2C bus more than one I2C device with the same fixed part of I2C address. The allocation of I2C addresses is administered by the I2C bus committee which takes care for the allocations.
How many distinct addresses are there in I2C?
I2C specifies 2 address lengths, 7 and 10 bits, which gives a theoretical maximum of 128 and 1024 distinct address, respectively. However, there are a few reserved addresses, such as 0x00 (general call).
Is there an upper limit to the I2C bus?
An i2c bus is limited mainly by the capacitance of the bus (and thus speed), and accessible device addresses. And physical board space. But there is no real upper limit, when you factor in bus buffers, extenders, repeaters, hubs, multiplexers, switches (or any other name for a device that can switch between multiple busses).
Which is the first bit of the slave address?
The first seven bits of the byte comprise the slave address. The eighth bit is the read/write flag where 0 indicates a write and 1 indicates a read. Figure 1: 7-bit addressing. The I2C bus specification specifies that in standard-mode I2C, the slave address is 7-bits long followed by the read/write bit.