EDS1232AABB データシートの表示（PDF） - Elpida Memory, Inc
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EDS1232AABB Datasheet PDF : 55 Pages
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EDS1232AABB, EDS1232AATA
Function Truth Table*1
Current state
Idle
Row active
Read
Write
/CS /RAS /CAS /WE Address
H× × × ×
L HH× ×
L H L H BA, CA, A10
L H L L BA, CA, A10
L L H H BA, RA
L L H L BA, A10
L L L H×
L L L L OPCODE
H× × × ×
L HH× ×
L H L H BA, CA, A10
L H L L BA, CA, A10
L L H H BA, RA
L L H L BA, A10
L L L H×
L L L L OPCODE
H× × × ×
L HHH×
L HHL ×
L H L H BA, CA, A10
L H L L BA, CA, A10
L L H H BA, RA
L L H L BA, A10
L L L H×
L L L L OPCODE
H× × × ×
L HHH×
L HHL ×
L H L H BA, CA, A10
L H L L BA, CA, A10
L L H H BA, RA
L L H L BA, A10
L L L H×
L L L L OPCODE
Command
DESL
NOP or BST
READ/READA
WRIT/ WRITA
ACT
PRE/PALL
REF/SELF
MRS
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
Operation
Notes
Nop or power down
2
Nop or power down
2
ILLEGAL
3
ILLEGAL
3
Row activating
Nop
CBR (auto) refresh or self refresh
4
Mode register accessing
Nop
Nop
Begin read: Determine AP
5
Begin write: Determine AP
5
ILLEGAL
3
Precharge
6
ILLEGAL
ILLEGAL
Continue burst to end → Row active
Continue burst to end → Row active
Burst stop → Row active
Terminate burst, new read: Determine AP 7
Terminate burst, begin write: Determine AP 7, 8
ILLEGAL
3
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 7, 8
Terminate burst, new write : Determine AP 7
ILLEGAL
3
Terminate burst, Precharging
9
ILLEGAL
ILLEGAL
Preliminary Data Sheet E0205E50 (Ver. 5.0)
18
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