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SM320C6455-EP
FIXED-POINT DIGITAL SIGNAL PROCESSOR
SPRS462B – SEPTEMBER 2007 – REVISED JANUARY 2008
7.11 I2C Peripheral
The inter-integrated circuit (I2C) module provides an interface between a C64x+ DSP and other devices
compliant with Philips Semiconductors Inter-IC bus (I2C bus) specification version 2.1 and connected by
way of an I2C-bus. External components attached to this 2-wire serial bus can transmit/receive up to 8 bit
data to/from the DSP through the I2C module.
7.11.1 I2C Device-Specific Information
The C6455 device includes an I2C peripheral module (I2C). NOTE: when using the I2C module, ensure
there are external pullup resistors on the SDA and SCL pins.
The I2C modules on the C6455 may be used by the DSP to control local peripherals ICs (DACs, ADCs,
etc.) or may be used to communicate with other controllers in a system or to implement a user interface.
The I2C port supports:
• Compatible with Philips I2C Specification Revision 2.1 (January 2000)
• Fast Mode up to 400 Kbps (no fail-safe I/O buffers)
• Noise Filter to remove noise 50 ns or less
• 7- and 10 Bit Device Addressing Modes
• Multi-Master (Transmit/Receive) and Slave (Transmit/Receive) Functionality
• Events: DMA, Interrupt, or Polling
• Slew-Rate Limited Open-Drain Output Buffers
Figure 7-41 is a block diagram of the I2C module.
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C64x+ Peripheral Information and Electrical Specifications
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