Data Sheet.
HY[B/E]18L512160BF-7.5
512-Mbit Mobile-RAM
TABLE 21
Current state definitions
Idle
The bank has been precharged, and tRP has been met
Row Active
A row in the bank has been activated, and tRCD has been met. No data bursts/accesses and no
register accesses are in progress
Read
Write
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
Read with AP
Enabled
Starts with registration of a READ command with Auto Precharge enabled and ends when tRP
has been met. Once tRP is met, the bank is in the idle state
Write with AP
Starts with registration of a WRITE command with Auto Precharge enabled and ends when tRP
has been met. Once tRP is met, the bank is in the idle state
Enabled
TABLE 22
Truth Table - CKE
CKEn-1
CKEn Current State
Command
Action
Notes
1)2)3)4)
L
L
Power Down
X
X
X
X
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
to
to
to
to
to
to
to
to
to
to
to
to
1)
1)
1)
1)
1)
1)
1)
1)
1)
1)
1)
1)
4)
4)
4)
4)
5)
4)
Self Refresh
Clock Suspend
Deep Power Down
Power Down
L
H
L
DESELECT or NOP
DESELECT or NOP
X
Self Refresh
Clock Suspend
Deep Power Down
All Banks Idle
Bank(s) Active
All Banks Idle
Read / Write burst
,
4) 6)
4)
X
H
H
DESELECT or NOP
DESELECT or NOP
AUTO REFRESH
(valid)
4)
4)
4)
Enter Clock Suspend
4)
H
See Table 16 and Table 20
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 tRC period.
6) Exit from DEEP POWER DOWN requires the same command sequence as for power-up initialization.
Rev. 1.22, 2006-12
46
01132005-06IU-IGVM
QIMONDA [ QIMONDA AG ]
