m5m4v4s40ctp-12 Mitsumi Electronics, Corp., m5m4v4s40ctp-12 Datasheet - Page 10

• Manufacturer Part Number: m5m4v4s40ctp-12
• Description: 2-bank 131072-word 16-bit Synchronous Dram
• Manufacturer: Mitsumi Electronics, Corp.

SDRAM (Rev. 0.3)
FUNCTION TRUTH TABLE for CKE
ABBREVIATIONS:
H=High Level, L=Low Level, X=Don’t Care
NOTES:
1. CKE Low to High transition will re-enable CLK and other inputs asynchronously . A minimum setup time must be
2. Power-Down and Self-Refresh can be entered only from the All Banks Idle State.
3. Must be legal command.
Feb ‘97 Preliminary
satisfied before any command other than EXIT.
Current State
ALL BANKS
ANY STATE
listed above
REFRESH*1
other than
POWER
IDLE*2
DOWN
SELF-
4M (2-BANK x 131072-WORD x 16-BIT) Synchronous DRAM
CKE
n-1
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
CKE
H
H
H
H
H
H
H
H
H
n
X
L
X
L
L
L
L
L
L
L
X
L
L
/CS
X
H
X
X
X
X
X
H
X
X
X
X
X
L
L
L
L
L
L
L
L
L
MITSUBISHI ELECTRIC
/RAS /CAS
X
X
H
H
H
X
X
X
X
X
X
H
H
H
X
X
X
X
X
L
L
L
M5M4V4S40CTP-12, -15
H
H
H
H
X
X
L
X
X
X
X
X
X
L
X
L
X
X
X
X
X
X
/WE
H
H
H
X
X
L
X
X
X
X
X
X
X
X
L
X
X
X
X
X
X
X
Add
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
INVALID
Exit Self-Refresh (Idle after tRC)
Exit Self-Refresh (Idle after tRC)
ILLEGAL
ILLEGAL
ILLEGAL
NOP (Maintain Self-Refresh)
INVALID
Exit Power Down to Idle
NOP (Maintain Self-Refresh)
Refer to Function Truth Table
Enter Self-Refresh
Enter Power Down
Enter Power Down
ILLEGAL
ILLEGAL
ILLEGAL
Refer to Current State =Power Down
Refer to Function Truth Table
Begin CLK Suspend at Next Cycle*3
Exit CLK Suspend at Next Cycle*3
Maintain CLK Suspend
Action
MITSUBISHI LSIs
10