參數(shù)資料
型號: HYB18T256800AFL-37
廠商: INFINEON TECHNOLOGIES AG
英文描述: 256 Mbi t DDR2 SDRAM
中文描述: 256姆噸DDR2內存
文件頁數(shù): 20/90頁
文件大小: 1711K
代理商: HYB18T256800AFL-37
Page 20 Rev. 1.02 May 2004
INFINEON Technologies
HYB18T256400/800/160AF
256Mb DDR2 SDRAM
2.3 Off-Chip Driver (OCD) Impedance Adjustment
DDR2 SDRAM supports driver calibration feature and the flow chart below is an example of the sequence. Every
calibration mode command should be followed by “OCD calibration mode exit” before any other command being
issued. MRS should be set before entering OCD impedance adjustment and ODT (On Die Termination) should be
carefully controlled depending on system environment.
Start
EMRS: Drive(1)
DQ & DQS High; DQSLow
Test
EMRS :
Enter Adjus t Mode
BL=4 code input to all DQs
Inc, Dec, or NOP
EMRS: Drive(0)
DQ & DQS Low; DQSHigh
Test
EMRS :
Enter Adjust Mode
BL=4 code input to all DQs
Inc, Dec, or NOP
EMRS: OCD calibration mode exit
End
ALL OK
ALL OK
Need Calibration
EMRS: OCD calibration mode exit
MRS should be set before entering OCD impedance adjustment and ODT should
be carefully controlled depending on system environment
EMRS: OCD calibration mode exit
EMRS: OCD calibration mode exit
EMRS: OCD calibration mode exit
EMRS: OCD calibration mode exit
Need Calibration
相關PDF資料
PDF描述
HYB18T256400AFL-3S 256 Mbi t DDR2 SDRAM
HYB18T256800AFL-3S 256 Mbi t DDR2 SDRAM
HYB18T256400AFL-5 256 Mbi t DDR2 SDRAM
HYB18T256800AFL-5 256 Mbi t DDR2 SDRAM
HYB18T256800AC DDR2 Registered DIMM Modules
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