HY[B/E]18L128160B[C/F]-7.5
128-Mbit Mobile-RAM
Functional DescriptionFunction Truth Tables
7) READs or WRITEs listed in the Command/Action column include READs or WRITEs with Auto Precharge enabled and
READs or WRITEs with Auto Precharge disabled.
8) Requires appropriate DQM masking.
9) Concurrent Auto Precharge: bank n will start precharging when its burst has been interrupted by a READ or WRITE
command to bank m.
Table 17
Truth Table - CKE
CKEn-1 CKEn
Current State
Power Down
Command
Action
Notes
1)2)3)4)
L
L
X
X
X
X
Maintain Power Down
Maintain Self Refresh
Maintain Clock Suspend
to
to
to
Self Refresh
Clock Suspend
Deep Power Down
Maintain Deep Power
Down
to
L
H
L
Power Down
DESELECT or NOP
Exit Power Down
to 5)
to
Self Refresh
DESELECT or NOP
Exit Self Refresh
Clock Suspend
Deep Power Down
All Banks Idle
X
Exit Clock Suspend
Exit Deep Power Down
to , 6)
to
X
H
DESELECT or NOP
Enter Precharge Power
Down
to
to
to
to
Bank(s) Active
DESELECT or NOP
AUTO REFRESH
(valid)
Enter Active Power Down
Enter Self Refresh
All Banks Idle
Read / Write burst
see Table 15 and Table 16
Enter Clock Suspend
H
H
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.
Data Sheet
44
Rev. 1.71, 2007-01
05282004-NZNK-8T0D
QIMONDA [ QIMONDA AG ]
