High Speed I2C Bus Controller

from CAST, Inc.

Features

• Transfers information between devices connected to the bus using two wires:
  • Serial clock line (SCL)
  • Serial data line (SDA)
• Performs serial transmission up to 100 kHz in four modes:
  • Master transmitter mode: Serial data output through SDA while SCL outputs the serial clock.
  • Master receiver mode: Serial data is received via SDA while SCL outputs the serial clock.
  • Slave receiver mode: Serial data and the serial clock are received through SDA and SCL.
  • Slave transmitter mode: Serial data is transmitted via SDA while the serial clock is input through SCL.

Block Diagram

Figure 1 shows the block diagram for the I²C Bus Controller megafunction.

Figure 1. Block Diagram

Description

The I²C Bus Controller megafunction provides a serial interface that meets the Philips I²C bus specification and supports all transfer modes from and to the I²C bus. The I²C logic handles byte transfer autonomously. It also keeps track of serial transfers, and a status register (i2csta) reflects the status of I²C Bus Controller and the I²C bus.

The I²C function is a microcode-free design developed for reuse in application-specific integrated circuit (ASIC) and programmable logic device (PLD) implementations. The design is strictly synchronous with positive-edge clocking, no internal tri-states, and a synchronous reset.

Device Utilization Example

Table 1 lists the typical device utilization results for the megafunction.

Note:

1. The logic element count for Stratix II devices is based on the number of adaptive look-up tables (ALUTs) used for the design as reported by the Quartus^® II software.

Deliverables

• Encrypted Licenses
  • Post-synthesis Altera hardware description language (AHDL) or electronic data interchange format (EDIF)
  • Assignment and configuration
  • Symbol file
  • Include file
  • Graphic design file with sample design
  • Vectors for testing the functionality of the megafunction
• HDL Source Licenses
  • VHDL or Verilog register transfer level (RTL) source code
  • Testbench
  • Example testbench wrapper for post-route simulation
  • Vectors for testbench
  • Simulation script
  • Synthesis script
  • Expected results for testbench

Contact Information

For additional information, contact CAST, Inc. at:

CAST, Inc.
11 Stonewall Court
Woodcliff Lake, NJ 07677, USA
Phone: +1 (201) 391-8300
Fax: +1 (201) 391-8694
Email: info@cast-inc.com
URL: http://www.cast-inc.com

Note: The I²C megafunction is licensed from Evatronix S.A.