参数资料
型号: HY5PS1G821LM-E3
厂商: HYNIX SEMICONDUCTOR INC
元件分类: DRAM
英文描述: 1Gb DDR2 SDRAM(DDP)
中文描述: 128M X 8 DDR DRAM, 0.6 ns, PBGA63
封装: FBGA-63
文件页数: 18/79页
文件大小: 1109K
代理商: HY5PS1G821LM-E3
Rev. 0.2 / Oct. 2005
18
1
HY5PS12421(L)M
HY5PS12821(L)M
2.3.2.3 Off-Chip Driver (OCD) Impedance Adjustment
DDR2 SDRAM supports driver calibration feature and the flow chart below is an example of 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 Termian-
tion) should be carefully controlled depending on system environment.
Start
EMRS: Drive(1)
DQ & DQS High; DQS Low
Test
EMRS :
Enter Adjust Mode
BL=4 code input to all DQs
Inc, Dec, or NOP
EMRS: Drive(0)
DQ & DQS Low; DQS High
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
Need Calibration
EMRS: OCD calibration mode exit
EMRS: OCD calibration mode exit
EMRS: OCD calibration mode exit
EMRS: OCD calibration mode exit
EMRS: OCD calibration mode exit
MRS shoud be set before entering OCD impedance adjustment and ODT should
be carefully controlled depending on system environment
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HY5PS1G821M 制造商:HYNIX 制造商全称:Hynix Semiconductor 功能描述:1Gb DDR2 SDRAM(DDP)
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HY5PS1G831AFP 制造商:HYNIX 制造商全称:Hynix Semiconductor 功能描述:1Gb DDR2 SDRAM
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