Contents
How is I2C protocol implemented?
Basics
- Start Condition. To initiate the address frame, the controller device leaves SCL high and pulls SDA low.
- Address Frame. The address frame is always first in any new communication sequence.
- Data Frames.
- Stop condition.
- 10-bit Addresses.
- Repeated Start Conditions.
- Clock Stretching.
How are I2C addresses assigned?
The allocation of I2C addresses is administered by the I2C bus committee which takes care for the allocations. Two groups of 8 I2C addresses are reserved for future uses and one address is used for 10-bit I2C addressing. The general call address is used to address all devices on the slave bus.
Does I2C master have an address?
The only bad news about I2C is that each I2C device must have a unique address – and the addresses only range from 0 to 127 (aka 0 to 0x7F hex). One thing this means is that if you have two accelerometers (lets say) and they both have address 0x22 you cannot have both of them on the same I2C lines.
Is the I2C controller reference design-Intel?
The use of this design is governed by, and subject to, the terms and conditions of the Intel® Design Example License Agreement The Microtronix inter-IC (I 2 C) Controller reference design uses the I 2 C controller intellectual property (IP) along with the Nios ® II embedded processor and peripherals.
What is the purpose of the I2C protocol?
The Inter-integrated Circuit (I 2C) Protocol is a protocol intended to allow multiple “slave” digital integrated circuits (“chips”) to communicate with one or more “master” chips. Like the Serial Peripheral Interface (SPI), it is only intended for short distance communications within a single device.
Is the Intel SMBus controller compatible with I2C?
I2C * is a common interface on a wide variety of components used in IA32 designs. The Intel® SMBus controller can work with many of these devices in addition to being able to communicate with native SMBus devices. Certain I2C protocols are different from SMBus protocols.
How many I2C devices can I put on the same bus?
Depending on what is connected to the bus and the design, you can include about 7x I2C devices on the same bus. However, if you are having any issues, you can cut the two traces connecting to the center jumper pad using an hobby knife or remove solder on the three jumper pads using a soldering iron to disconnect the resistors on certain boards.