參數(shù)資料
型號(hào)： HYB18L256160B
廠商： QIMONDA
英文描述： DRAMs for Mobile Applications 256-Mbit Mobile-RAM
中文描述： DRAM的針對(duì)移動(dòng)應(yīng)用256兆移動(dòng)RAM
文件頁(yè)數(shù)： 47/58頁(yè)
文件大?。?/td> 1766K
代理商： HYB18L256160B
Data Sheet
Rev. 1.73, 2006-09
01302004-CZ2R-J9SE
47
HY[B/E]18L256160B[C/F]L-7.5
256-Mbit Mobile-RAM
TABLE 21
Current state definitions
TABLE 22
Truth Table - CKE
Idle
Row Active
The bank has been precharged, and
t
RP
has been met
A row in the bank has been activated, and
t
RCD
has been met. No data bursts/accesses and no
register accesses are in progress
A READ burst has been initiated, with Auto Precharge disabled, and has not yet terminated or
been terminated
A WRITE burst has been initiated, with Auto Precharge disabled, and has not yet terminated or
been terminated
Starts with registration of a READ command with Auto Precharge enabled and ends when
t
RP
has been met. Once
t
RP
is met, the bank is in the idle state
Starts with registration of a WRITE command with Auto Precharge enabled and ends when
t
RP
has been met. Once
t
RP
is met, the bank is in the idle state
Read
Write
Read with AP
Enabled
Write with AP
Enabled
CKEn-1
CKEn
Current State
Command
Action
Note
L
L
Power Down
Self Refresh
Clock Suspend
Deep Power Down
Power Down
Self Refresh
Clock Suspend
Deep Power Down
All Banks Idle
Bank(s) Active
All Banks Idle
Read / Write burst
See
Table 16
and
Table 20
X
X
X
X
DESELECT or NOP
DESELECT or NOP
X
X
DESELECT or NOP
DESELECT or NOP
AUTO REFRESH
(valid)
Maintain Power Down
Maintain Self Refresh
Maintain Clock Suspend
Maintain Deep Power Down
Exit Power Down
Exit Self Refresh
Exit Clock Suspend
Exit Deep Power Down
Enter Precharge Power Down
Enter Active Power Down
Enter Self Refresh
Enter Clock Suspend
1)2)3)4)
1) CKEn is the logic state of CKE at clock edge n; CKEn-1 was the state of CKE at the previous clock edge.
2) Current state is the state immediately prior to clock edge n.
3) COMMAND n is the command registered at clock edge n; ACTION n is a result of COMMAND n.
4) All states and sequences not shown are illegal or reserved.
5) DESELECT or NOP commands should be issued on any clock edges occurring during
t
RC
period.
6) Exit from DEEP POWER DOWN requires the same command sequence as for power-up initialization.
1)
to
4)
1)
to
4)
1)
to
4)
L
H
1)
to
4)
1)
to
5)
1)
to
4)
1)
to
4)
,
6)
H
L
1)
to
4)
1)
to
4)
1)
to
4)
1)
to
4)
H
H
1)
to
4)
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