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How can the LS1012A RDB use a crystal and have SATA enabled at the same time?

Question asked by Kenneth Olsen on Apr 5, 2018
Latest reply on Apr 9, 2018 by Kenneth Olsen

I’m currently investigating if the LS1012A could be used for my next design.

While reading the QorIQ LS1012A Reference Manual, I found that (as I understand it) you can’t use a crystal as the main clock, if SATA is enabled. However when I look at the LS1012A RDB reference design board, it uses a 25MHz crystal and has a SATA connector, and Thus I would assume SATA can be enabled on the board?.

What am I missing?


From LS1012A Reference Manual: SATA use cases

For the systems with a SATA interface, an external clock oscillator/generator is required,

as shown in the figure below:

Figure 4-10. SATA clocking

Crystal cannot be used when SATA is enabled on the chip."