參數(shù)資料
型號(hào)： HYB18T256400AF-3S
廠(chǎng)商： INFINEON TECHNOLOGIES AG
英文描述： 256 Mbi t DDR2 SDRAM
中文描述： 256姆噸DDR2內(nèi)存
文件頁(yè)數(shù)： 19/90頁(yè)
文件大?。?/td> 1246K
代理商： HYB18T256400AF-3S
HYB18T256400/800/160AF
256Mb DDR2 SDRAM
INFINEON Technologies
Page 19 Rev. 1.02 May 2004
2.2.5 EMRS(2) Extended Mode Register
The Extended Mode Registers EMRS(2) and EMRS(3) are reserved for future use and must be programmed
when setting the mode register during initialization.
The extended mode register EMRS(2) is written by asserting low on CS, RAS, CAS, WE, BA2, BA0
and high on
BA1, while controlling the state of the address pins. The DDR2 SDRAM should be in all bank precharge with CKE
already high prior to writing into the extended mode register. The mode register set command cycle time (tMRD)
must be satisfied to complete the write operation to the EMRS(2). Mode register contents can be changed using
the same command and clock cycle requirements during normal operation as long as all banks are in precharge
state
2.2.6 EMRS(3) Extended Mode Register
The Extended Mode Register EMRS(3) is reserved for future use and all bits except BA0 and BA1 must be pro-
grammed to 0 when setting the mode register during initialization
.
Address Field
Extended Mode
Register(2)
BA1 BA0
A11 A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
0
A12
A13~A15
BA2
0*
1
0*
EMRS(2)
*) must be programmed to "0"
Address Field
Extended Mode
Register(3)
BA1 BA0
A11 A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
1
A12
A13~A15
BA2
0*
1
0*
*) must be programmed to "0"
相關(guān)PDF資料
PDF描述
HYB18T256400AF-5 256 Mbi t DDR2 SDRAM
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HYB18T256400AF-5 制造商:Infineon Technologies AG 功能描述:SDRAM, DDR, 64M x 4, 60 Pin, Plastic, BGA
HYB18T256800AF-5 制造商:Infineon Technologies AG 功能描述:
HYB18T512161BF-25 制造商:Qimonda 功能描述:SDRAM, DDR, 32M x 16, 84 Pin, Plastic, BGA
HYB18T512400AF-5 制造商:Intersil Corporation 功能描述:SDRAM, DDR, 128M x 4, 60 Pin, Plastic, BGA
HYB18T512400BF-3S 制造商:Qimonda 功能描述:
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