K4D551638D Datasheet, PDF (6/18 Pages) Samsung semiconductor – 256Mbit GDDR SDRAM

K4D551638D-TC
BLOCK DIAGRAM (4Mbit x 16I/O x 4 Bank)
256M GDDR SDRAM
CK,CK
ADDR
Bank Select
CK, CK
16
Intput Buffer
Data Input Register
Serial to parallel
LWE
LDMi
4Mx16
4Mx16
4Mx16
4Mx16
32
16
x16
DQi
Column Decoder
Latency & Burst Length
LCKE
LRAS LCBR LWE
LCAS
Programming Register
LWCBR
Timing Register
DLL
CK,CK
LDMi
Data Strobe
CK,CK CKE CS RAS CAS WE LDM UDM
-6-
Rev 1.8 (Oct. 2003)