OMAP-L137 Datasheet, PDF (190/219 Pages) Texas Instruments – Low-Power Applications Processor

OMAP-L137 Low-Power Applications Processor
SPRS563A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
6.24 Inter-Integrated Circuit Serial Ports (I2C0, I2C1)
6.24.1 I2C Device-Specific Information
Having two I2C modules on the OMAP-L137 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 6-61 is block
diagram of the OMAP-L137 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
I2Cx_SCL
I2Cx_SDA
Noise
Filter
Noise
Filter
Clock Prescaler
I2CPSCx
Bit Clock Generator
I2CCLKHx
I2CCLKLx
Transmit
I2CXSRx
I2CDXRx
Receive
I2CDRRx
I2CRSRx
Control
I2CPFUNC
I2CPDIR
I2CPDIN
Prescaler
Register
Clock Divide
High Register
Clock Divide
Low Register
Transmit Shift
Register
Transmit Buffer
Receive Buffer
Receive Shift
Register
Control
I2CCOARx
I2CSARx
I2CCMDRx
I2CEMDRx
I2CCNTx
I2CPID1
I2CPID2
Interrupt/DMA
I2CIERx
I2CSTRx
I2CSRCx
Pin Function
Register
Pin Direction
Register
Pin Data In
Register
I2CPDOUT
I2CPDSET
I2CPDCLR
Own Address
Register
Slave Address
Register
Mode Register
Extended Mode
Register
Data Count
Register
Peripheral ID
Register 1
Peripheral ID
Register 2
Interrupt Enable
Register
Interrupt Status
Register
Interrupt Source
Register
Pin Data Out
Register
Pin Data Set
Register
Pin Data Clear
Register
Peripheral
Configuration
Bus
Interrupt DMA
Requests
Figure 6-61. I2C Module Block Diagram
6.24.2 I2C Peripheral Registers Description(s)
Table 6-83 is the list of the I2C registers.
190 Peripheral Information and Electrical Specifications
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