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AR# 52659

KC705 - Si570 oscillator - How to reprogram the frequency, and is it volatile?


Can the Si570 on the KC705 be programmed to a different value other than its default frequency? (156.250 MHz).

If so, does power cycling the KC705 board revert the user clock to its default frequency?


On power-up the user clock defaults to an output frequency of 156.250 MHz.

User applications can change the output frequency within the range of 10 MHz to 810 MHz through an I2C interface.

For instructions on how to do so, see (XTP186):

Power cycling the KC705 board will revert the user clock to its default frequency of 156.250 MHz.
AR# 52659
Date Created 10/30/2012
Last Updated 02/24/2015
Status Active
Type General Article
  • Kintex-7
Boards & Kits
  • Kintex-7 FPGA KC705 Evaluation Kit