參數(shù)資料
型號: HB52F168EN
廠商: Hitachi,Ltd.
英文描述: 64 MB Unbuffered SDRAM DIMM(64 MB 未緩沖同步DRAM DIMM)
中文描述: 64 MB的無緩沖SDRAM的內(nèi)存(64 MB的未緩沖同步的DRAM內(nèi)存)
文件頁數(shù): 39/71頁
文件大小: 906K
代理商: HB52F168EN
HB52F88EM-75F, HB52F89EM-75F, HB52F168EN-75F, HB52F169EN-
39
From ROW ACTIVE state, command operation
To [DESL], [NOP] or [BST]:
These commands result in no operation.
To [READ], [READ A]:
A read operation starts. (However, an interval of t
RCD
is required.)
To [WRIT], [WRIT A]:
A write operation starts. (However, an interval of t
RCD
is required.)
To [ACTV]:
This command makes the other bank active. (However, an interval of t
RRD
is required.) At-
tempting to make the currently active bank active results in an illegal command.
To [PRE], [PALL]:
These commands set the SDRAM module to precharge mode. (However, an interval
of t
RAS
is required.)
From READ state, command operation
To [DESL], [NOP]:
These commands continue read operations until the burst operation is completed.
To [BST]:
This command stops a full-page burst.
To [READ], [READ A]:
Data output by the previous read command continues to be output. After CE la-
tency, the data output resulting from the next command will start.
To [WRIT], [WRIT A]:
These commands stop a burst read, and start a write cycle.
To [ACTV]:
This command makes other banks bank active. (However, an interval of t
RRD
is required.) At-
tempting to make the currently active bank active results in an illegal command.
To [PRE], [PALL]:
These commands stop a burst read, and the SDRAM module enters precharge mode.
From READ with AUTO-PRECHARGE state, command operation
To [DESL], [NOP]:
These commands continue read operations until the burst operation is completed, and
the SDRAM module then enters precharge mode.
To [ACTV]:
This command makes other banks bank active. (However, an interval of t
RRD
is required.) At-
tempting to make the currently active bank active results in an illegal command.
From WRITE state, command operation
To [DESL], [NOP]:
These commands continue write operations until the burst operation is completed.
To [BST]:
This command stops a full-page burst.
To [READ], [READ A]:
These commands stop a burst and start a read cycle.
To [WRIT], [WRIT A]:
These commands stop a burst and start the next write cycle.
To [ACTV]:
This command makes the other bank active. (However, an interval of t
RRD
is required.) At-
tempting to make the currently active bank active results in an illegal command.
相關(guān)PDF資料
PDF描述
HB52F169EN 64 MB Unbuffered SDRAM DIMM(64 MB 未緩沖同步DRAM DIMM)
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