W641GG2JB Datasheet, PDF (56/109 Pages) Winbond – 1-Gbit GDDR3 Graphics SDRAM

W641GG2JB
6.11.5 Clock, CKE and command / Address Timings
tCK
CLK#
CLK
tIPW
CMD,
ADDR,
CKE
tCH
tIS tIH
1-Gbit GDDR3 Graphics SDRAM
tCL
Don‘t care
Setup and Hold Timing for CKE is equal to CMD and ADDR Setup and Hold Timing.
6.12 Bank Activations with REFRESH
6.12.1 Bank Activations with REFRESH Command
Operating
Mode
2X REF Mode
Bank Refreshed per REF Command
1-CS Mode
off
4 even or 4 odd banks in all 4 quedrants
on
All 8 banks in all 4 quadrants
2-CS Mode
off
4 even or 4 odd banks in selected rank (rank 0 or rank 1) or in
both ranks
on
All 8 banks in selected rank (rank 0 or rank 1) or in both ranks
Effective tRET
32ms
16ms
32ms
16ms
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Publication Release Date: Apr, 22, 2011
Revision A01-002