Backup Clock Generator: Difference between revisions
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| image_size = 150px | | image_size = 150px | ||
| partnumber = Cypress CY28517<br>ICS MK1493 | | partnumber = Cypress CY28517<br>ICS MK1493 | ||
| introduced = | | introduced = Mid 2005 | ||
| usedin = [[Xenon (Motherboard)|Xenon]]<br>[[Elpis (Motherboard)|Elpis]] | | usedin = [[Xenon (Motherboard)|Xenon]]<br>[[Elpis (Motherboard)|Elpis]] | ||
| package = TSSOP28 | | package = TSSOP28 | ||
| Line 10: | Line 10: | ||
}} | }} | ||
The '''Backup Clock Generator''' was added to the [[Xenon (Motherboard)|Xenon]] motherboard due to the [[ANA]]'s clock generator having excessive PLL jitter. | 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. | The chip used is a Cypress CY28517. Certain prototype motherboards used the ICS MK1493. | ||
== Specifications == | == Specifications == | ||
Latest revision as of 03:05, 16 December 2023
 | |
| Part Number | Cypress CY28517 ICS MK1493 |
|---|---|
| Introduced | Mid 2005 |
| Used In | Xenon Elpis |
| 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. 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