NT5DS4M32EG Datasheet, PDF (29/46 Pages) NanoAmp Solutions, Inc. – 1M × 32 Bits × 4 Banks Double Data Rate Synchronous RAM With Bi-Directional Data Strobe and DLL

NanoAmp Solutions, Inc.
NT5DS4M32EG
Advance Information
Table 16: Function Truth Table for CKE
Current State
SELF-
REFRESHING
Both Bank Pre-
charge
POWER DOWN
ALL BANKS
IDLE
CKEn-1
H
L
L
L
L
L
L
H
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
H
H
Any State Other
than listed above
L
L
CKEn
X
H
H
H
H
H
L
X
H
H
H
H
H
L
H
L
L
L
L
L
L
L
X
H
L
H
L
/CS /RAS /CAS /WE
Add
Action
X
X
X
X
X
INVALID
H
X
X
X
X
Exit Self-Refresh*1
L
H
H
H
X
Exit Self-Refresh*1
L
H
H
L
X
ILLEGAL
L
H
L
X
X
ILLEGAL
L
L
X
X
X
ILLEGAL
X
X
X
X
X
NOP(Maintain Self-Refresh)
X
X
X
X
X
INVALID
H
X
X
X
X
Exit Power Down*2
L
H
H
H
X
Exit Power Down*2
L
H
H
L
X
ILLEGAL
L
H
L
X
X
ILLEGAL
L
L
X
X
X
ILLEGAL
X
X
X
X
X
NOP(Maintain Power Down)
X
X
X
X
X
Refer to Function True Table
H
X
X
X
X
Enter Power Down*3
L
H
H
H
X
Enter Power Down*3
L
H
H
L
X
ILLEGAL
L
H
L
X
X
ILLEGAL
L
L
H
H
RA
Row(& Bank) Active
L
L
L
H
X
Enter Self-Refresh *3
L
L
L
L Op Code Mode Register Access
X
X
X
X
X
Refer to Current
State=Power Down
X
X
X
X
X
Refer to Function True Table
X
X
X
X
X
Begin Clock Suspend next
Cycle*4
X
X
X
X
X
Exit Clock Suspend next
cycle*4
X
X
X
X
X
Maintain Clock Suspend
ABBREVIATIONS :
H=High Level, L=Low Level, V=Valid, X=Don’t care
Note :
1. After CKE’s low to high transition to exist self refresh mode. And a time of tRC(min) has to be elapse after CKE’s low to high
transition to issue a new command.
2. CKE low to high transition is asynchronous as if restarts internal clock.
A minimum setup time “tIS + one clock” must be satisfied before any command other than exit.
3. Power-down and self-refresh can be entered only from the all banks idle state.
4. Must be a legal command.
Doc # 14-02-045 Rev A ECN 01-1118
29
The specifications of this device are subject to change without notice. For latest documentation see http://www.nanoamp.com.