參數(shù)資料
型號(hào): MT48V16M16LFFG
廠商: Micron Technology, Inc.
英文描述: MOBILE SDRAM
中文描述: 移動(dòng)SDRAM
文件頁(yè)數(shù): 28/58頁(yè)
文件大小: 1451K
代理商: MT48V16M16LFFG
28
256Mb: x16 Mobile SDRAM
MobileRamY26L_A.p65 – Pub. 5/02
Micron Technology, Inc., reserves the right to change products or specifications without notice.
2002, Micron Technology, Inc.
256Mb: x16
MOBILE SDRAM
ADVANCE
TRUTH TABLE 2 – CKE
(Notes: 1-4)
CKE
n-1
CKE
n
L
CURRENT STATE
Power-Down
Self Refresh
Clock Suspend
Power-Down
Deep Power-Down
Self Refresh
Clock Suspend
All Banks Idle
All Banks Idle
All Banks Idle
Reading or Writing
COMMAND
n
X
X
X
ACTION
n
Maintain Power-Down
Maintain Self Refresh
Maintain Clock Suspend
Exit Power-Down
Exit Deep Power-Down
Exit Self Refresh
Exit Clock Suspend
Power-Down Entry
Deep Power-Down Entry
Self Refresh Entry
Clock Suspend Entry
NOTES
L
L
H
COMMAND INHIBIT or NOP
X
COMMAND INHIBIT or NOP
X
COMMAND INHIBIT or NOP
DEEP POWER DOWN
AUTO REFRESH
VALID
See Truth Table 3
5
8
6
7
H
L
8
H
H
NOTE:
1. CKE
is the logic state of CKE at clock edge
n
; CKE
was the state of CKE at the previous clock edge.
2. Current state is the state of the SDRAM immediately prior to clock edge
n
.
3. COMMAND
is the command registered at clock edge
n
, and ACTION
n
is a result of COMMAND
n
.
4. All states and sequences not shown are illegal or reserved.
5. Exiting power-down at clock edge
n
will put the device in the all banks idle state in time for clock edge
n + 1
(provided
that
t
CKS is met).
6. Exiting self refresh at clock edge
n
will put the device in the all banks idle state once
t
XSR is met. COMMAND INHIBIT
or NOP commands should be issued on any clock edges occurring during the
t
XSR period. A minimum of two NOP
commands must be provided during
t
XSR period.
7. After exiting clock suspend at clock edge
n
, the device will resume operation and recognize the next command at clock
edge
n + 1
.
8. Deep Power-Down is a power savings feature of this Mobile SDRAM device. This command is Burst Terminate on
traditional SDRAM components. For Bat Ram devices, this command sequence is assigned to Deep Power Down.
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