How many addressing modes are available in I2C?
Table of Contents
How many addressing modes are available in I2C?
Contents. The I2C specification from NXP (formerly Philips) actually specifies two different slave addressing schemes. Standard Mode I2C makes use of 7-bit addressing. 10-bit addressing was later added as an extension to standard mode I2C.
How do you address an I2C device?
All I2C addresses are either 7 bits or 10 bits….So to write to a slave device:
- Send a start sequence.
- Send the I2C address of the slave with the R/W bit low (even address)
- Send the internal register number you want to write to.
- Send the data byte.
- [ Optionally, send any further data bytes]
- Send the stop sequence.
What determines I2C address?
A simple means of checking if a specific I2C slave device is using an 8-bit address is to check the range of the address. A 7-bit address should always fall between 0x07 (7) and 0x78 (120). Generally, if your address is outside of this range, the vendor of the I2C slave device has likely assigned an 8-bit I2C address.
What is I2C subaddress?
“Sub-addressing” is a term used to refer to the notion that, often, I2 Cbased devices will utilize internal addresses that are independent from the device address, as defined in the I2C specification.
Can I2C have multiple masters?
The I2C component is an ideal solution when networking multiple devices on a single board or small system. The system can be designed with a single master and multiple slaves, multiple masters, or a combination of masters and slaves.
How does I2C address work?
The address of the slave with which the master wants to communicate is sent by the master to every slave connected with it. The slave then compares its own address with this address and sends ACK. I2C Packet Format : In the I2C communication protocol, the data is transmitted in the form of packets.
How many slaves can be connected in I2C?
Each device on an i2c network has a 7-bit address, so a single network theoretically supports up to 128 slave devices.In practice though, the limit is much lower. i2c slave chips often support only 8 different bus addresses, no more than 8 of that chip can be attached to the same i2c network.
Is I2C a parallel communication?
It is a synchronous, serial communication protocol which is intended to allow multiple slave digital ICs to communicate with one or more master chips. This type of communication is best suitable for short distance communications within a single device. Each I2C bus consists of a clock signal and a data signal.
