參數資料
型號: HYE25L256160AC-8
廠商: INFINEON TECHNOLOGIES AG
英文描述: 256-Mbit Mobile-RAM
中文描述: 256兆移動RAM
文件頁數: 15/55頁
文件大?。?/td> 1053K
代理商: HYE25L256160AC-8
L
Data Sheet
15
V1.1, 2003-04-16
HYE25L256160AC
256-Mbit Mobile-RAM
Functional Description
3.4
Commands
All of SDRAM operations are defined by states of control signals CS, RAS, CAS, WE, and DQM at the positive
edge of the clock. The following list shows the truth table for the operation commands.
Table 5
Operation
Operation Definition
1)
1) V = Valid, x = Don’t Care, L = Low Level, H = High Level.
Device
State
Idle
3)
Any
Any
Active
3)
Active
3)
Active
3)
Active
3)
Idle
Any
Active
Any
Idle
Idle
Idle
(Self Refresh)
CKE
n-1
2)
H
H
H
H
H
H
H
H
H
H
H
H
H
2) CKE
n
signal is input level when commands are provided, CKE
n-1
signal is input level one clock before the commands are
provided.
CKE
n
2)
X
X
X
X
X
X
X
X
X
X
X
H
L
DQM BA1
BA0
V
V
X
V
V
V
V
V
X
X
X
X
X
AP=
A10
V
L
H
L
H
L
H
V
X
X
X
X
X
Addr CS RAS CAS WE
Bank Active
Bank Precharge
Precharge All
Write
Write with Autoprecharge
Read
Read with Autoprecharge
Mode Register Set
No Operation
Burst Stop
Device Deselect
Auto Refresh
Self Refresh Entry
Self Refresh Exit
3) This is the state of the banks designated by BA0, BA1 signals.
X
X
X
X
X
X
X
X
X
X
X
X
X
V
X
X
V
V
V
V
V
X
X
X
X
X
L
L
L
L
L
L
L
L
L
L
H
L
L
H
L
X
X
H
L
H
L
X
X
L
X
L
L
L
H
H
H
H
L
H
H
X
L
L
X
H
X
X
X
H
X
H
X
X
H
X
H
H
H
L
L
L
L
L
H
H
X
L
L
X
H
X
X
X
H
X
H
X
X
H
X
H
L
L
L
L
H
H
L
H
L
X
H
H
X
X
X
X
X
H
X
L
X
X
L
X
H
X
X
X
X
Clock Suspend Entry
Clock Suspend Exit
Power Down Entry
(Precharge or active standby)
Active
4)
Active
Idle
Active
4)
Any
(Power Down)
4) Power Down Mode can not be entered during a burst cycle. When this command is asserted during a burst
cycle the device enters Clock Suspend Mode.
H
L
L
H
X
X
X
X
X
X
X
X
H
L
X
X
X
X
Power Down Exit
L
H
X
X
X
X
Data Write/Output Enable
Data Write/Output Disable
Deep Power Down Entry
Deep Power Down Exit
Active
Active
Idle
Deep Power Down
5)
H
H
H
L
X
X
L
H
L
H
X
X
X
X
X
X
X
X
X
X
X
X
X
X
5) After Deep Power Down mode exit a full new initialisation of the memory device is mandatory.
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