參數(shù)資料
型號(hào): V59C1G01408QAJ37E
廠商: PROMOS TECHNOLOGIES INC
元件分類: 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): 9/79頁(yè)
文件大?。?/td> 1029K
代理商: V59C1G01408QAJ37E
17
ProMOS TECHNOLOGIES
V59C1G01(408/808/168)QA
V59C1G01(408/808/168)QA Rev. 1.2 April 2008
Drive Mode
Drive mode, both Drive(1) and Drive(0), is used for controllers to measure DDR2 SDRAM Driver impedance
before OCD impedance adjustment. In this mode, all outputs are driven out tOIT after “enter drive mode”
command and all output drivers are turned-off tOIT after “OCD calibration mode exit” command as the follow-
ing timing diagram.
EMRS
NOP
EMRS
CMD
CK
DQS
DQ
Enter Drive mode
OCD calibration mode exit
tOIT
Hi-Z
DQs high for Drive(1)
DQS high & /DQSlow for Drive(1), DQS low & /DQS high for Drive(0)
Hi -Z
DQs low for Drive(0)
tOIT
CK
DQS
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