I²C Bus Interface - Slave with Avalon interface

The I2C is a two-wire, bi-directional serial bus that provides a simple and efficient method of data transmission over a short distance between many devices. The DI2CS-Avalon core provides an interface between parallel Avalon bus and serial I2C bus. It can works as a slave transmitter or slave receiver depending on working mode determined by a master device. The DI2CS-Avalon core incorporates all features required by the latest I2C specification including clock synchronization, arbitration and High-speed transmission mode. The DI2CS-Avalon supports all the transmission speed modes.
The DI2CS-Avalon is a technology independent design that can be implemented in a variety of process technologies.

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Compliant with Avalon interface specification, Revision 1.0 Single Avalon input clock for registers and I2C bus serial clock generation Conforms to v.3.0 of the I2C specification Slave operation Slave transmitter Slave receiver Supports 3 transmission speed modes Standard (up to 100 kb/s) Fast (up to 400 kb/s) Fast Plus (up to 1 Mb/s) High Speed (up to 3,4 Mb/s) Allows operation from a wide range of input clock frequencies Simple interface allows easy connection to existing Avalon systems Interrupt generation User-defined data setup time Fully synthesizable Static synchronous design Positive edge clocking and no internal tri-states Scan test ready

Embedded microprocessor boards Consumer and professional audio/video Home and automotive radio Low-power applications Communication systems Cost-effective reliable automotive systems

Pin	Type	Description
clk	input	Global clock
reset	input	Global reset
sdai	input	I2C bus data line (input)
scli	input	I2C bus clock line (input)
writedata (7:0)	input	Avalon write data bus
write	input	Avalon write data bus
read	input	Avalon read data bus
chipselect	input	Avalon chip select
irq	output	Interrupt request
sdao	output	I2C bus data line (output)
sclo	output	I2C bus clock line (output)
readdata (7:0)	output	Avalon read data bus