eds1232aase Elpida Memory, Inc., eds1232aase Datasheet - Page 17

• Manufacturer Part Number: eds1232aase
• Description: 128m Bits Sdram
• Manufacturer: Elpida Memory, Inc.

Function Truth Table*
Current state
Idle
Row active
Read
Write
Data Sheet E0350E31 (Ver. 3.1)
/CS
H
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
/RAS /CAS /WE Address
×
H
H
H
L
L
L
L
×
H
H
H
L
L
L
L
×
H
H
H
H
L
L
L
L
×
H
H
H
H
L
L
L
L
1
×
H
L
L
H
H
L
L
×
H
L
L
H
H
L
L
×
H
H
L
L
H
H
L
L
×
H
H
L
L
H
H
L
L
×
×
H
L
H
L
H
L
×
×
H
L
H
L
H
L
×
H
L
H
L
H
L
H
L
×
H
L
H
L
H
L
H
L
×
×
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
×
OPCODE
×
×
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
×
OPCODE
×
×
×
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
×
OPCODE
×
×
×
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
×
OPCODE
MRS
Command
DESL
NOP or BST
READ/READA
WRIT/ WRITA
ACT
PRE/PALL
REF/SELF
DESL
NOP or BST
READ/READA
WRIT/ WRITA
ACT
PRE/PALL
REF/SELF
MRS
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
17
Operation
Nop or power down
Nop or power down
ILLEGAL
ILLEGAL
Row activating
Nop
CBR (auto) refresh or self refresh
Mode register accessing
Nop
Nop
Begin read: Determine AP
Begin write: Determine AP
ILLEGAL
Precharge
ILLEGAL
ILLEGAL
Continue burst to end → Row active
Continue burst to end → Row active
Burst stop → Row active
Terminate burst, new read: Determine AP
Terminate burst, begin write: Determine AP 7, 8
ILLEGAL
Terminate burst, Precharging
ILLEGAL
ILLEGAL
Continue burst to end → Write recovering
Continue burst to end → Write recovering
Burst stop → Row active
Terminate burst, start read : Determine AP
Terminate burst, new write : Determine AP
ILLEGAL
Terminate burst, Precharging
ILLEGAL
ILLEGAL
EDS1232AASE
Notes
2
2
3
3
4
5
5
3
6
7
3
7, 8
7
3
9