DDR3 connection between the clock and the CKE

[zeevg]

Hi,

when working with DDR3 what are the connection between the clock and the CKE (clock enable)?

could I work with two clock signals and one CKE?

could I work with any CKE for any clock?

pls. advise.

Zeev Gerber

[ufedor]

Please refer to the AN3940 - Hardware and Layout Design Considerations for DDR3 SDRAM, Table 1. DDR3 designer checklist:

37. Connect each of the MODT signals that are in the same group to the same physical memory bank:

• MODT(0), MCS(0), MCKE(0)
• MODT(1), MCS(1), MCKE(1)
• MODT(2), MCS(2), MCKE(2)
• MODT(3), MCS(3), MCKE(3)