參數資料
型號： HYB18L256160BF-7.5
廠商： INFINEON TECHNOLOGIES AG
英文描述： RT ANG PCB CONT .40/1.295 BULK
中文描述： BJAWBMSpecialty DRAM的移動RAM
文件頁數： 42/49頁
文件大?。?/td> 1327K
代理商： HYB18L256160BF-7.5
Command
X
X
X
X
HY[B/E]18L256160B[C/F]-7.5
256-Mbit Mobile-RAM
Functional Description
Data Sheet
42
V1.4, 2004-04-30
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.
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:
Write:
Read with AP
Enabled:
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.
Write with AP
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
CKEn-1
L
Truth Table - CKE
CKEn
Current State
L
Power Down
Self Refresh
Clock Suspend
Deep Power Down
Action
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
Notes
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
Power Down
Self Refresh
Clock Suspend
Deep Power Down
All Banks Idle
DESELECT or NOP
DESELECT or NOP
X
X
DESELECT or NOP
1) to 4)
1) to 5)
1) to 4)
1) to 4), 6)
H
L
1) to 4)
Bank(s) Active
All Banks Idle
Read / Write burst
DESELECT or NOP
AUTO REFRESH
(valid)
see
Table 14
and
Table 15
1) to 4)
1) to 4)
1) to 4)
H
H
1) to 4)
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