SM320C6727B-EP Datasheet, PDF (92/109 Pages) Texas Instruments – Floating-Point Digital Signal Processor

SM320C6727B-EP
SPRS793A – SEPTEMBER 2011 – REVISED OCTOBER 2011
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4.15 Inter-Integrated Circuit Serial Ports (I2C0, I2C1)
4.15.1 I2C Device-Specific Information
Having two I2C modules on the C672x simplifies system architecture, since one module may be used by
the DSP to control local peripherals ICs (DACs, ADCs, etc.) while the other may be used to communicate
with other controllers in a system or to implement a user interface. Figure 4-39 is block diagram of the
C672x I2C Module.
Each 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
• Seven- and Ten-Bit Device Addressing Modes
• Master (Transmit/Receive) and Slave (Transmit/Receive) Functionality
• Events: DMA, Interrupt, or Polling
• General-Purpose I/O Capability if not used as I2C
CAUTION
The C672x I2C pins use a standard ±8 mA LVCMOS buffer, not the slow I/O buffer
defined in the I2C specification. Series resistors may be necessary to reduce noise at
the system level.
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Peripheral and Electrical Specifications
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