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Silicon Labs ClockBuilder Desktop Pro software should be used to prepare the register file.  Projects are included on the most reference designs.

Download: ClockBuilder Desktop Pro for SI5338SI5345

Procedure:

  1. Install and start ClockBuilder
  2. Select SI5338
  3. Options → Open register map file
    Note: File location <design name>Open "/misc/Si5338/RegisterMap.txtSI5345/Si5345-RevB-0808-02A-Project.slabtimeproj"
  4. Modify settings
  5. Options → save C code header files
  6. Replace Header files from modified TE FSBL template or SCU FPGA projects with generated file

Note: SI338 is now included into Clock Builder Pro. Projects for this software are not available, but will be included in the future

Download: ClockBuilder Pro for SI5338

Procedure:

  1. working in process
  1. Export → Register File → select C code header → save to file


I2C Configuration

Volatile memory

For Zynq based system Si5338 Si5345 can be initialized during FSBL execution. For FPGA based modules init can be done by the application MicroBlaze.

Examples are included in the reference designs.

Procedure with FSBL or MicroBlaze c code:

  1. Replace Header files from modified FSBL template or SCU FPGA projects with exported header file and regenerate software.

Procedure with Clock Builder Pro:

  1. Open/Create Project with CLK Builder Pro
    Image Added
  2. Set correct Host Interface (I2C address and IO Voltage)
  3. Program Design to SI5345
    Image Added

Non-volatile memory (NVM)

NVM can 't be programmed on the module. This must be done before the device is assembled.  NVM is only one time programmable, before assembled. Depending of the Module Series, NVM of the SI5338 is empty or preprogrammed with fixed setup, see TRM.two time programmable!  NVM is normaly not preprogrammed an can be done by costumer.

Therefore SI Clock Builder Pro Software and Clock Builder Pro Field Programmer  are necessary.

Procedure:

  1. Connect GND, I2C-SCL and I2-SDA_SDIO with SI5345 I2C bus of the board.
  2. Connect USB to PC and Power on the module
  3. Open Clock Builder Pro and select NVM Program Tool
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  4. Select SI545 project and set correct Host Interface (I2C address and IO Voltage)
  5.  Scan device
    Image Added
  6. Program NVM


Termination

AN408 describes the input termination options for Si5338.

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