K4H560438D-TC Datasheet, PDF (5/25 Pages) Samsung semiconductor – 256Mb

256Mb
Block Diagram (4Mbit x 16 I/O x 4 Banks)
DDR SDRAM
ADD
Bank Select
CK, CK
16
Data Input Register
Serial to parallel
LWE
LDM
32
2Mx32
2Mx32
2Mx32
2Mx32
32
16
x16
DQi
Column Decoder
Latency & Burst Length
LCKE
LRAS LCBR LWE
Programming Register
LCAS
LWCBR
Timing Register
CK, CK
LDM
Data Strobe
CK, CK CKE
CS
RAS CAS
WE L(U)DM
Rev. 0.4 May. 2002
-5-