W641GG2JB Datasheet, PDF (89/109 Pages) Winbond – 1-Gbit GDDR3 Graphics SDRAM

6.20.1.2 Self Refresh Entry
W641GG2JB
1-Gbit GDDR3 Graphics SDRAM
6.21 Self-Refresh Exit (SREFEX)
To exit the Self Refresh Mode, a stable external clock is needed before setting CKE high asynchronously. Once the Self-Refresh
Exit command is registered, a delay equal or longer than t_XSRD must be satisfied before a read command can be applied. During
this time, the DLL is automatically enabled, reset and calibrated.
CKE must remain HIGH for the entire Self-Refresh exit period and commands must be gated off with CS# held HIGH. Alternately,
NOP commands may be registered on each positive clock edge during the Self Refresh exit interval.
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Publication Release Date: Apr, 22, 2011
Revision A01-002