HYB25L512160AC Datasheet, PDF (44/50 Pages) Infineon Technologies AG – 512MBit Mobile-RAM

HYB25L512160AC–7.5
512MBit Mobile-RAM
Functional Description
3) Current state definitions:
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.
Read:
A READ burst has been initiated, with Auto Precharge disabled, and has not yet terminated or been
terminated.
Write:
A WRITE burst has been initiated, with Auto Precharge disabled, and has not yet terminated or been
terminated.
Read with AP
Enabled:
Write with AP
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.
Enabled:
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.
4) AUTO REFRESH, SELF REFRESH and MODE REGISTER SET commands may only be issued when all banks are idle.
5) A BURST TERMINATE command cannot be issued to another bank; it applies to the bank represented by the current state
only.
6) All states and sequences not shown are illegal or reserved.
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 16 Truth Table - CKE
CKEn-1 CKEn Current State
L
L
Power Down
Self Refresh
Clock Suspend
Deep Power Down
L
H
Power Down
Self Refresh
Clock Suspend
Deep Power Down
H
L
All Banks Idle
Bank(s) Active
All Banks Idle
All Banks Idle
Read / Write burst
H
H
Command
Action
X
Maintain Power Down
X
Maintain Self Refresh
X
Maintain Clock Suspend
X
Maintain Deep Power Down
DESELECT or NOP Exit Power Down
DESELECT or NOP Exit Self Refresh
X
Exit Clock Suspend
X
Exit Deep Power Down
DESELECT or NOP Enter Precharge Power Down
DESELECT or NOP Enter Active Power Down
AUTO REFRESH
Enter Self Refresh
BURST STOP
Enter Deep Power Down
(valid)
Enter Clock Suspend
see Table 14 and Table 15
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.
Notes
1)2)3)4)
1) to 4)
1) to 4)
1) to 4)
1) to 4)
1) to 5)
1) to 4)
1) to 4)
1) to 4)
1) to 4)
1) to 4)
1) to 4)
1) to 4)
1) to 4)
Data Sheet
44
Rev. 1.3, 2004-04
10212003-BSPE-77OL