HY5DU28422BT Datasheet, PDF (7/33 Pages) Hynix Semiconductor – 128M-S DDR SDRAM

FUNCTIONAL BLOCK DIAGRAM (16Mx8)
4Banks x 4Mbit x 8 I/O Double Data Rate Synchronous DRAM
HY5DU28422B(L)T
HY5DU28822B(L)T
CLK
/CLK
CKE
/CS
Command
/RAS
Decoder
/CAS
/WE
DM
Bank
Control
Mode
Register
Row
Decoder
Write Data Register
8
2-bit Prefetch Unit
16
4Mx8/Bank0
4Mx8/Bank1
4Mx8/Bank2
4Mx8/Bank3
16
8
DS
DQ [0:7]
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
7