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參數(shù)資料
型號: W946432AD
廠商: WINBOND ELECTRONICS CORP
英文描述: 512K X 4 BANKS X 32 BITS DDR SDRAM
中文描述: 為512k × 4銀行× 32位DDR內(nèi)存
文件頁數(shù): 35/40頁
文件大小: 462K
代理商: W946432AD
W946432AD
35
Figure28:BANK READ ACCESS
BANK READ ACCESS
CK
CK
CKE
t
IS
t
IH
t
CK
t
CH
t
CL
NOP
ACT
READ
NOP
NOP
PRE
NOP
NOP
NOP
COMMAND
t
IS
t
IH
NOP
RA
Col n
RA
RA
RA
ALL BANKS
ONE BANK
Bank x
t
IS
t
IH
BA0,BA1
Bank x
*Bank x
DQS
DQ
t
RPST
t
DQmin
t
RPRE
t
LZ
min
t
LZ
min
t
AC
DO
n
HZ
DQS
DQ
DON'T CARE
max
t
RPRE
t
LZ
max
DO
n
t
DQSCK
max
t
AC
t
RPST
HZ
DIS AP
t
IS
t
IH
t
RC
CL=3
t
RAS
t
RCD
t
RP
DM
A8
A9,A10
A0-A7
ACT
RA
RA
Bank x
t
AC
/t
DQSCK=min
t
AC
/t
DQSCK=max
DO n = Data Out from column n
Burst Length = 4
DIS AP = Disable Autoprecharge
* = "Don't Care", if A8 is HIGH at this point
PRE = PRECHARGE, ACT = ACTIVE, RA = Row Address, BA = Bank Address
NOP commands are shown for ease of illustration; other commands may be valid at these times
Note that tRCD MIN so that the same timing applies if Autoprecharge is enabled (in which case tRAS would be limiting)
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