Backup Clock Generator

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Backup Clock Generator
CY28517.jpg
Part NumberCypress CY28517
ICS MK1493
IntroducedLate 2005
Used InXenon
Elpis
PackageTSSOP28
SuccessorHANA

The Backup Clock Generator was added to the Xenon motherboard due to the ANA's clock generator having excessive PLL jitter. Starting in Zephyr, the PLL jitter was fixed in HANA and thus the Backup Clock Generator was removed.

The chip used is a Cypress CY28517. Pre final motherboards used the ICS MK1493.

Specifications

  • 4x 100MHz differential: CPU, GPU, PCIe, SATA
  • 1x 48MHz single ended: SMC, USB
  • 2x 25MHz single ended: Ethernet, SATA