EDL1216CASA Ver la hoja de datos (PDF) - Elpida Memory, Inc
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EDL1216CASA Datasheet PDF : 59 Pages
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EDL1216CASA
Function Truth Table
Current state
Idle
Row active
Read
Write
/CS /RAS /CAS /WE Address
Command
Action
Notes
H× × × ×
DESL
Nop
L HHH×
NOP
Nop
L HHL ×
BST
Nop
L H L H BA, CA, A10 READ/READA ILLEGAL
2
L H L L BA, CA, A10 WRIT/ WRITA ILLEGAL
2
L L H H BA, RA
ACT
→ Row activating
L L H L BA, A10
PRE/PALL
Nop
L L L H×
REF
Auto refresh
L L L L OC, BA1= L MRS
Mode register set
L L L L OC, BA1= H EMRS
Extended mode register set
H× × × ×
DESL
Nop
L HHH×
NOP
Nop
L HHL ×
BST
Nop
L H L H BA, CA, A10 READ/READA Begin read
3
L H L L BA, CA, A10 WRIT/ WRITA Begin write
3
L L H H BA, RA
ACT
ILLEGAL
2
L L H L BA, A10
PRE/PALL
Precharge/Precharge all banks
4
L L L H×
REF
ILLEGAL
L L L L OC, BA
MRS/EMRS ILLEGAL
H× × × ×
DESL
Continue burst to end → Row active
L HHH×
NOP
Continue burst to end → Row active
L HHL ×
BST
Burst stop → Row active
L H L H BA, CA, A10 READ/READA Terminate burst, begin new read
5
L H L L BA, CA, A10 WRIT/WRITA Terminate burst, begin write
5, 6
L L H H BA, RA
ACT
ILLEGAL
2
L L H L BA, A10
PRE/PALL
Terminate burst → Precharging
L L L H×
REF
ILLEGAL
L L L L OC, BA
MRS/EMRS ILLEGAL
H× × × ×
DESL
Continue burst to end → Write recovering
L HHH×
NOP
Continue burst to end → Write recovering
L HHL ×
BST
Burst stop → Row active
L H L H BA, CA, A10 READ/READA Terminate burst, start read : Determine AP 5, 6
L H L L BA, CA, A10 WRIT/WRITA Terminate burst, new write : Determine AP 5
L L H H BA, RA
ACT
ILLEGAL
2
L L H L BA, A10
PRE/PALL
Terminate burst → Precharging
7
L L L H×
REF
ILLEGAL
L L L L OC, BA
MRS/EMRS ILLEGAL
Data Sheet E0195E30 (Ver. 3.0)
15
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