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AS4C2M32SA датащи(PDF) 9 Page - Alliance Semiconductor Corporation

номер детали AS4C2M32SA
подробное описание детали  64Mb SDRAM AS4C2M32SA - 86pin TSOP II PACKAGE
PDF  54 Pages
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производитель  ALSC [Alliance Semiconductor Corporation]
домашняя страница  https://www.alliancememory.com
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AS4C2M32SA датащи(HTML) 9 Page - Alliance Semiconductor Corporation

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CLK
COMMAND
DQM
Figure 6. Read to Write Interval (Burst Length ≥ 4, CAS# Latency = 2)
T0
T1
T2
T3
T4
T5
T6
T7
T8
CAS# latency=2
tCK2, DQ
Must be Hi-Z before
the Write Command
NOP
NOP
BANKA
ACTIVATE
NOP
READ A WRITE A
DIN A0
DIN A1
NOP
NOP
DIN A2
NOP
T9
DIN A3
NOP
Figure 7. Read to Write Interval (Burst Length ≥ 4, CAS# Latency = 2)
Don’t Care
CLK
COMMAND
T0
T1
DQM
T2
T3
T4
T5
T6
T7
T8
CAS# latency=2
tCK2, DQ
Must be Hi-Z before
the Write Command
NOP
READ A
NOP
NOP
NOP
DIN B3
DIN B2
DIN B1
DIN B0
NOP
WRITE B
NOP
NOP
Figure 8. Read to Write Interval (Burst Length ≧ 4, CAS# Latency = 3)
CLK
COMMAND
T0
T1
T2
T3
T4
T5
T6
NOP
READ A
NOP
NOP
NOP
NOP
WRITE B
NOP
T7
T8
NOP
DQM
DOUT A0
DIN B0
DIN B1
DIN B2
CAS# Latency=3
tCK3, DQ
Must be Hi-Z before
the Write Command
Don’t Care
A read burst without the auto precharge function may be interrupted by a BankPrecharge/
PrechargeAll command to the same bank. The following figure shows the optimum time that
BankPrecharge/ PrechargeAll command is issued in different CAS latency.
AS4C2M32SA-6TIN
AS4C2M32SA-6TCN
AS4C2M32SA-7TCN
Confidential
-9/54-
Rev.1.0 Sep. 2015



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