HYB25D256400B Datasheet, PDF (26/83 Pages) Infineon Technologies AG – 256 Mbit Double Data Rate SDRAM

HYB25D256[400/800/160]B[T/C](L)
256-Mbit Double Data Rate SDRAM
Functional Description
CK
CK
Command
Address
DQS
DQ
CAS Latency = 2
Read
BA a,COL n
NOP
CL=2
NOP
NOP
DOa-n
NOP
NOP
CK
CK
Command
Address
DQS
DQ
CAS Latency = 2.5
Read
BA a,COL n
NOP
NOP
NOP
CL=2.5
DOa-n
NOP
NOP
DO a-n = data out from bank a, column n.
3 subsequent elements of data out appear in the programmed order following DO a-n.
Shown with nominal t_AC, t_DQSCK, and t_DQSQ.
Don’t Care
Figure 10 Read Burst: CAS Latencies (Burst Length = 4)
Data Sheet
26
Rev. 1.2, 2004-02
02102004-TSR1-4ZWW