K4H560438D-TC Datasheet, PDF (3/25 Pages) Samsung semiconductor – 256Mb

256Mb
Block Diagram (16Mbit x 4 I/O x 4 Banks)
DDR SDRAM
CK, CK
ADD
Bank Select
CK, CK
4
Data Input Register
Serial to parallel
8
8Mx8
8Mx8
8
8Mx8
8Mx8
WE
DM
4
x4
DQi
Column Decoder
Latency & Burst Length
LCKE
LRAS LCBR LWE
Programming Register
LCAS
LWCBR
CK, CK
DM
Timing Register
Data Strobe
CK, CK CKE
CS
RAS CAS
WE
DM
Rev. 0.4 May. 2002
-3-