EM639165 Etron Technology Inc., EM639165 Datasheet - Page 5

• Manufacturer Part Number: EM639165
• Description: 8Mega x 16bits SDRAM
• Manufacturer: Etron Technology Inc.

COMMAND TRUTH TABLE
Preliminary
H=High Level, L=Low Level, V=Valid, X=Don't Care, n=CLK cycle number
NOTE: 1. A7-A9 =0, A0-A6 =Mode Address
Single Bank Precharge
Precharge All Banks
Auto-Refresh
No Operation
Row Address Entry &
Column Address Entry
Column Address Entry &
Column Address Entry
Column Address Entry &
Self-Refresh Entry
Burst Terminate
Mode Register Set
Deselect
Self-Refresh Exit
Write with Auto-Precharge
Read with Auto-Precharge
Bank Active
&Write
& Read
COMMAND
MNEMONIC
WRITE A
DESEL
READA
REFSX
WRITE
TBST
PREA
READ
REFA
REFS
MRS
NOP
ACT
PRE
CKE
n-1
H
H
H
H
H
H
H
H
H
H
H
H
L
L
H
5
CKE
n
X
X
X
X
X
X
X
X
X
H
H
H
X
X
L
/CS
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
/RAS /CAS
X
H
H
H
H
H
X
H
L
L
L
L
L
L
H
X
H
H
H
H
X
H
L
L
L
L
L
L
L
H
/WE BA0,1 A1 1
X
H
H
H
H
H
H
X
H
L
L
L
L
L
L
X
X
V
V
X
V
V
V
V
X
X
X
X
X
L
Rev 1.0
X
X
X
V
X
X
V
V
V
V
X
X
X
X
L
EM639165
A1 0
X
X
V
H
H
H
X
X
X
X
X
L
L
L
L
Feb. 2001
A0-9
V*1
X
X
X
V
X
X
V
V
V
V
X
X
X
X