EDS1232CASE 查看數據表（PDF） - Elpida Memory, Inc
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EDS1232CASE Datasheet PDF : 53 Pages
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EDS1232CASE
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
Operation
Notes
DESL
Nop or power down
2
NOP or BST Nop or power down
2
READ/READA ILLEGAL
3
WRIT/ WRITA ILLEGAL
3
ACT
Row activating
PRE/PALL
Nop
REF/SELF
CBR (auto) refresh or self refresh
4
MRS
Mode register accessing
DESL
Nop
NOP or BST Nop
READ/READA Begin read: Determine AP
5
WRIT/ WRITA Begin write: Determine AP
5
ACT
ILLEGAL
3
PRE/PALL
Precharge
6
REF/SELF
ILLEGAL
MRS
ILLEGAL
DESL
Continue burst to end → Row active
NOP
Continue burst to end → Row active
BST
Burst stop → Row active
READ/READA Terminate burst, new read: Determine AP 7
WRIT/WRITA Terminate burst, begin write: Determine AP 7, 8
ACT
ILLEGAL
3
PRE/PALL
Terminate burst, Precharging
REF/SELF
ILLEGAL
MRS
ILLEGAL
DESL
Continue burst to end → Write recovering
NOP
Continue burst to end → Write recovering
BST
Burst stop → Row active
READ/READA Terminate burst, start read : Determine AP 7, 8
WRIT/WRITA Terminate burst, new write : Determine AP 7
ACT
ILLEGAL
3
PRE/PALL
Terminate burst, Precharging
9
REF/SELF
ILLEGAL
MRS
ILLEGAL
Data Sheet E0351E30 (Ver. 3.0)
17
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