Backup Clock Generator: Difference between revisions

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(Created page with "{{Infobox Chip | name = Backup Clock Generator | image = CY28517.jpg | image_size = 150px | partnumber = Cypress CY28517<br>ICS MK1493 | introduced = Late 2005 | usedin = Xenon (Motherboard)<br>Elpis(Motherboard) | package = TSSOP28 | successor = HANA }} The '''Backup Clock Generator''' was added to the Xenon motherboard due to the ANA's clock generator having excessive PLL jitter. Starting in ...")
 
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| name        = Backup Clock Generator
| name        = Backup Clock Generator
| image        = CY28517.jpg
| image        = CY28517.jpg
| image2      = ICS-MK149313AGLF.jpg
| image_size  = 150px
| image_size  = 150px
| partnumber  = Cypress CY28517<br>ICS MK1493
| partnumber  = Cypress CY28517<br>ICS MK1493
| introduced  = Late 2005
| introduced  = Mid 2005
| usedin      = [[Xenon (Motherboard)]]<br>[[Elpis(Motherboard)]]
| usedin      = [[Xenon (Motherboard)|Xenon]]<br>[[Elpis (Motherboard)|Elpis]]
| package      = TSSOP28
| package      = TSSOP28
| successor    = [[HANA]]
| successor    = [[HANA]]
}}
}}


The '''Backup Clock Generator''' was added to the [[Xenon (Motherboard)|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 '''Backup Clock Generator''' was added to the [[Xenon (Motherboard)|Xenon]] motherboard due to the [[ANA]]'s clock generator having excessive PLL jitter. The [[HANA]] chip added on [[Zephyr]] fixed the PLL jitter issue and thus the Backup Clock Generator was removed.


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


== Specifications ==
== Specifications ==

Latest revision as of 23:34, 1 August 2024

Backup Clock Generator
CY28517.jpg
ICS-MK149313AGLF.jpg
Part NumberCypress CY28517
ICS MK1493
IntroducedMid 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. The HANA chip added on Zephyr fixed the PLL jitter issue and thus the Backup Clock Generator was removed.

The chip used is a Cypress CY28517. Certain prototype 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