HY5DU561622EFP Datasheet, PDF (7/29 Pages) Hynix Semiconductor – 256Mb DDR SDRAM

FUNCTIONAL BLOCK DIAGRAM (16Mx16)
4Banks x 4Mbit x 16 I/O Double Data Rate Synchronous DRAM
1
HY5DU56822E(L)FP
HY5DU561622E(L)FP
CLK
/CLK
CKE
/CS
/RAS
/CAS
/WE
Command
Decoder
Bank
Control
Write Data Register
16
2-bit Prefetch Unit
32
4Mx16 / Bank0
4Mx16 / Bank1
4Mx16 / Bank2
32 16
Mode
Register
Row
Decoder
4Mx16 / Bank3
LDQS, UDQS
LDM, UDM
DQ[0:15]
ADD
Address
BA
Buffer
Column Decoder
Column Address
Counter
CLK_DLL
LDQS
UDQS
LDQS, UDQS
Data Strobe
Transmitter
Data Strobe
Receiver
CLK,
/CLK
DLL
Block
Mode
Register
Rev. 1.1 / June 2006
7