HY5DU28422ETP Datasheet, PDF (11/35 Pages) Hynix Semiconductor – 128Mb DDR SDRAM

HY5DU28422ETP
HY5DU28822ETP
HY5DU281622ETP
OPERATION COMMAND TRUTH TABLE-I
Current
State
IDLE
ROW
ACTIVE
READ
WRITE
/CS /RAS /CAS /WE Address
Command
Action
H
X
X
X
X
DSEL
NOP or power down³
L
H
H
H
X
NOP
NOP or power down³
L
H
H
L
X
BST
ILLEGAL⁴
L
H
L
H
BA, CA, AP
READ/READAP
ILLEGAL⁴
L
H
L
L
BA, CA, AP WRITE/WRITEAP
ILLEGAL⁴
L
L
H
H
BA, RA
ACT
Row Activation
L
L
H
L
BA, AP
PRE/PALL
NOP
L
L
L
H
X
AREF/SREF
Auto Refresh or Self Refresh⁵
L
L
L
L
OPCODE
MRS
Mode Register Set
H
X
X
X
X
DSEL
NOP
L
H
H
H
X
NOP
NOP
L
H
H
L
X
BST
ILLEGAL⁴
L
H
L
H
BA, CA, AP
READ/READAP
Begin read: optional AP⁶
L
H
L
L
BA, CA, AP WRITE/WRITEAP
Begin write: optional AP⁶
L
L
H
H
BA, RA
ACT
ILLEGAL⁴
L
L
H
L
BA, AP
PRE/PALL
Precharge⁷
L
L
L
H
X
AREF/SREF
ILLEGAL¹¹
L
L
L
L
OPCODE
MRS
ILLEGAL¹¹
H
X
X
X
X
DSEL
Continue burst to end
L
H
H
H
X
NOP
Continue burst to end
L
H
H
L
X
BST
Terminate burst
L
H
L
H
BA, CA, AP
READ/READAP
Term burst, new read:optional AP⁸
L
H
L
L
BA, CA, AP WRITE/WRITEAP
ILLEGAL
L
L
H
H
BA, RA
ACT
ILLEGAL⁴
L
L
H
L
BA, AP
PRE/PALL
Term burst, precharge
L
L
L
H
X
AREF/SREF
ILLEGAL¹¹
L
L
L
L
OPCODE
MRS
ILLEGAL¹¹
H
X
X
X
X
DSEL
Continue burst to end
L
H
H
H
X
NOP
Continue burst to end
L
H
H
L
X
BST
ILLEGAL⁴
L
H
L
H
BA, CA, AP
READ/READAP
Term burst, new read:optional AP⁸
L
H
L
L
BA, CA, AP WRITE/WRITEAP Term burst, new write:optional AP
Rev. 0.3 /Apr. 2006
11