Backup Clock Generator: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| (2 intermediate revisions by the same user not shown) | |||
| Line 2: | Line 2: | ||
| 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 = | | introduced = Mid 2005 | ||
| usedin = [[Xenon (Motherboard)|Xenon]]<br>[[Elpis (Motherboard)|Elpis]] | | usedin = [[Xenon (Motherboard)|Xenon]]<br>[[Elpis (Motherboard)|Elpis]] | ||
| package = TSSOP28 | | package = TSSOP28 | ||
| Line 12: | Line 13: | ||
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 '''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 23:34, 1 August 2024
 | |
 | |
| 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