K4D553238F Datasheet, PDF (6/17 Pages) Samsung semiconductor – 256Mbit GDDR SDRAM

K4D553238F-GC
BLOCK DIAGRAM (1Mbit x 32I/O x 4 Bank)
256M GDDR SDRAM
CK,CK
ADDR
Bank Select
CK, CK
32
Intput Buffer
LWE
Data Input Register
Serial to parallel
64
LDMi
2Mx32
2Mx32
2Mx32
2Mx32
64
32
x32
DQi
Column Decoder
Latency & Burst Length
LCKE
LRAS LCBR LWE
LCAS
Programming Register
LWCBR
Timing Register
DLL
CK,CK
LDMi
Data Strobe
(DQS0~DQS3)
CK,CK CKE CS RAS CAS WE DMi
-6-
Rev 1.3 (Mar. 2005)