EM48AM1684VTC Datasheet, PDF (12/17 Pages) List of Unclassifed Manufacturers – 256Mb (4M×4Bank×16) Synchronous DRAM

eorex
EM48AM1684VTC
2. DQM Truth Table
Command
Symbol
CKE
/CS
n-1
n
Data Write/Output Enable
Data Mask/Output Disable
ENB
H
X
H
MASK
H
X
L
Upper Byte Write Enable/Output Enable
BSTH
H
X
L
Read
READ
H
X
L
Read with Auto Pre-charge
READA
H
X
L
Write
WRIT
H
X
L
Write with Auto Pre-charge
WRITA
H
X
L
Bank Activate
ACT
H
X
L
Pre-charge Select Bank
PRE
H
X
L
Pre-charge All Banks
PALL
H
X
L
Mode Register Set
MRS
H
X
L
H = High level, L = Low level, X = High or Low level (Don't care), V = Valid data input
3. CKE Truth Table
Item
Activating
Any
Command
Clock Suspend Mode Entry
Clock Suspend Mode
CKE
Symbol
/CS /RAS /CAS /WE
n-1 n
HL X X
X
X
LLX X
XX
Clock
Suspend
Idle
Clock Suspend Mode Exit
CBR Refresh Command
LHX X
REF H H L L
XX
LH
Idle
Self Refresh Entry
SELF H L L L
LH
Self Refresh Self Refresh Exit
LHL _H
LHH X
HH
XX
Idle
Power Down Entry
HL X X
X
X
Power Down Power Down Exit
LHX X
X
X
Remark H = High level, L = Low level, X = High or Low level (Don't care)
Addr.
X
X
X
X
X
X
X
X
X
Jul. 2006
12/17
www.eorex.com