K4D623238B-GC Datasheet, PDF (6/17 Pages) Samsung semiconductor – 64Mbit DDR SDRAM

K4D623238B-GC
BLOCK DIAGRAM (512Kbit x 32I/O x 4 Bank)
64M DDR SDRAM
CK,CK
ADDR
Bank Select
CK, CK
32
Intput Buffer
LWE
Data Input Register
Serial to parallel
64
LDMi
512Kx32
512Kx32
512Kx32
512Kx32
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. 1.4 (Sep. 2002)