Part Number: LMK05028
I want to know how to connect the LMK05028 to a 1588 system and PTP stack running in Altera device.
The LMK05028 can be programmed to DCO the PLLs by either GPIO or by I2C or SPI writes. It is also possible to do direct writes to the numerator as frequency control words.
There will be 4 GPIO lines available to allow either or both DPLL1 and DPLL2 to each have their own FINC/FDEC GPIO pins. Alternatively programming a register can also be used for FINC/FDEC. When using either method to cause frequency increment/decrement, a programmed frequency deviation register controls the step size.
Please refer to section 9.4.4. of the datasheet on DCO mode for more details.
Please let me know if this answered your question. Thank-you.
More information Clock and Timing System products: http://www.ti.com/clock-and-timing/overview.html
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.