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AD484M1644VTA-8I Schematic ( PDF Datasheet ) - ETC

Teilenummer AD484M1644VTA-8I
Beschreibung Ascend Semiconductor Corporation(64Mb SDRAM)
Hersteller ETC
Logo ETC Logo 




Gesamt 20 Seiten
AD484M1644VTA-8I Datasheet, Funktion
Ascend Semiconductor Corporation 64Mb SDRAM
AASSCCEENNDD
SSeemmiiccoonndduuccttoorr
6644MM SSDDRRAAMM
DDaattaa sshheeeett
Tel: (03)5635888 / Fax: (03)5635188/ http://www.ascendsemi.com.tw
Preliminary
1






AD484M1644VTA-8I Datasheet, Funktion
Ascend Semiconductor Corporation 64Mb SDRAM
Block Diagram
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
BA0
BA1
Auto/Self
Refresh Counter
Mode Register Set
Memory
Array
S/A & I/O gating
Col. Decoder
Col. Add. Buffer
Col. Add. Counter
Burst Counter
DQM
Write DQM
Control
Data In
Data Out
Read DQM
Control
Timing Register
CLK
/CLK
CKE
/CS /RAS /CAS /WE DQM
DQi
Preliminary
6

6 Page









AD484M1644VTA-8I pdf, datenblatt
Ascend Semiconductor Corporation 64Mb SDRAM
Current
state
Read with AP
/CS /R /C /W Addr.
HXXX
X
LHHH
X
LHH L
X
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
LL LH
X
L L L L Op-Code
Command
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
Action
Continue burst to end Precharging
Continue burst to end Precharging
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
HXXX
X
DESL
burst to end Write
recovering with auto precharge
LHHH
X
NOP
Continue burst to end Write
recovering with auto precharge
Write with AP
Precharging
Row activating
LHH L
X
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
LL LH
X
L L L L Op-Code
HXXX
X
LHHH
X
LHH L
X
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
LL LH
X
L L L L Op-Code
HXXX
X
LHHH
X
LHH L
X
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
LL LH
X
L L L L Op-Code
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
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
Nop Enter idle after tRP
Nop Enter idle after tRP
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
Nop Enter idle after tRP
ILLEGAL
ILLEGAL
Nop Enter idle after tRCD
Nop Enter idle after tRCD
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
Remark H = High level, L = Low level, X = High or Low level (Don't care), AP = Auto Precharge
Notes
3
3
3
3
3
3
3
3
3
3
3
3
3
3,10
3
Preliminary
12

12 Page





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