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H55S1G62MFP-A3 数据表(PDF) 33 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) 33 Page - Hynix Semiconductor

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Rev 1.2 / Jul. 2008
33
11
1Gbit (64Mx16bit) Mobile SDR Memory
H55S1G62MFP Series
READ to PRECHARGE
Following the PRECHARGE command, a subsequent command to the same bank cannot be issued until tRP is met.
Note that part of the row precharge time is hidden during the access of the last data element(s).
In the case of a fixed-length burst being executed to completion, a PRECHARGE command issued at the optimum time
(as described above) provides the same operation that would result from the same fixed-length burst with auto pre-
charge.
The disadvantage of the PRECHARGEcommand is that it requires that the command and address buses be available at
the appropriate time to issue the command; the advantage of the PRECHARGE command is that it can be used to trun-
cate fixed-length or full-page bursts.
READ to PRECHARGE
CLK
CL =3
CL =2
Don't Care
DQ
DQ
READ
PRE
ACT
Command
BA, Col
n
Address
Bank
A, All
BA,
Row
Do
n
tRP
Do
n
1) DO
n = Data Out from column n
2) Note that Precharge may not be issued before tRAS ns after the ACTIVE com mand for applicable banks.
3) The ACTIVE comm and may be applied if tRC has been m et.


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