HY5DU28422BT Datasheet, PDF (6/33 Pages) Hynix Semiconductor – 128M-S DDR SDRAM

FUNCTIONAL BLOCK DIAGRAM (32Mx4)
4Banks x 8Mbit x 4 I/O Double Data Rate Synchronous DRAM
HY5DU28422B(L)T
HY5DU28822B(L)T
CLK
/CLK
CKE
/CS
/RAS
/CAS
/WE
DM
Command
Decoder
Bank
Control
Mode
Register
Row
Decoder
Write Data Register
4
2-bit Prefetch Unit
8
8Mx4/Bank0
8Mx4/Bank1
8Mx4/Bank2
8Mx4/Bank3
8
4
DS
DQ [0:3]
ADD
BA0, BA1
Address
Buffer
Column Decoder
Column Address
Counter
CLK_DLL
DS
CLK
DLL
/CLK Block
DQS
Data Strobe
Transmitter
Data Strobe
Receiver
Mode
Register
Rev. 0.3/May. 02
6