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H55S1G62MFP-A3 数据表(PDF) 26 Page - Hynix Semiconductor

部件名 H55S1G62MFP-A3
功能描述  1Gb (64Mx16bit) Mobile SDRAM
Download  53 Pages
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制造商  HYNIX [Hynix Semiconductor]
网页  http://www.skhynix.com/kor/main.do
标志 HYNIX - Hynix Semiconductor

H55S1G62MFP-A3 数据表(HTML) 26 Page - Hynix Semiconductor

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Rev 1.2 / Jul. 2008
26
11
1Gbit (64Mx16bit) Mobile SDR Memory
H55S1G62MFP Series
DESELECT
The DESELECT function (CS = High) prevents new commands from being executed by the Mobile SDRAM, the Mobile
SDRAM ignore command input at the clock. However, the internal status is held. The Mobile SDRAM is effectively dese-
lected. Operations already in progress are not affected.
NO OPERATION
The NO OPERATION (NOP) command is used to perform a NOP to a Mobile SDRAM that is selected (CS = Low, RAS =
CAS = WE = High). This command is not an execution command. However, the internal operations continue. This pre-
vents unwanted commands from being registered during idle or wait states. Operations already in progress are not
affected. (see to next figure)
ACTIVE
The Active command is used to activate a row in particular bank for a subsequent Read or Write access. The value of
the BA0,BA1 inputs selects the bank, and the address provided on A0-A13(or the highest address bit) selects the row.
This row remains active (or open) for accesses until a PRECHARGE command is issued to that bank. (see to next fig-
ure)
CS
A0~A13
WE
CAS
RAS
Don't Care
CLK
CKE
(High)
BA0,1
CS
A0~A13
WE
Bank Address
CAS
RAS
Row Address
Don't Care
CLK
CKE
(High)
RA
BA
BA0,1
NOP command
ACTIVATING A SPECIFIC
ROW IN A SPECIFIC BANK


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