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參數(shù)資料
| 型號(hào)： | V59C1G01408QAJ37E |
| 廠商： | PROMOS TECHNOLOGIES INC |
| 元件分類(lèi)： | DRAM |
| 英文描述： | 256M X 4 DDR DRAM, 0.5 ns, PBGA68 |
| 封裝： | ROHS COMPLIANT, FBGA-68 |
| 文件頁(yè)數(shù)： | 6/79頁(yè) |
| 文件大小： | 1029K |
| 代理商： | V59C1G01408QAJ37E |
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14
V59C1G01(408/808/168)QA Rev. 1.2 April 2008
ProMOS TECHNOLOGIES
V59C1G01(408/808/168)QA
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 com-
mand being issued. MRS should be set before entering OCD impedance adjustment and ODT (On Die Termi-
nation) should be carefully controlled depending on system environment.
Start
EMRS: Drive(1)
DQ & DQS High:DQS Low
Test
EMRS: OCD calibration mode exit
EMRS :
Enter Adjust Mode
BL=4 code input to all
DQs
Inc, Dec, or NOP
EMRS: OCD calibration mode exit
EMRS: Drive(0)
DQ & DQS Low:DQS High
Test
EMRS: OCD calibration mode exit
EMRS :
Enter Adjust Mode
BL=4 code input to all
DQs
Inc, Dec, or NOP
EMRS: OCD calibration mode exit
Need Calibration
EMRS: OCD calibration mode exit
ALL OK
EMRS: OCD calibration mode exit
End
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