參數(shù)資料
型號(hào): HY5DV641622AT-5
廠商: HYNIX SEMICONDUCTOR INC
元件分類: DRAM
英文描述: 64M(4Mx16) DDR SDRAM
中文描述: 4M X 16 DDR DRAM, 0.5 ns, PDSO66
封裝: 0.400 X 0.875 INCH, 0.65 MM PITCH, TSOP2-66
文件頁(yè)數(shù): 16/27頁(yè)
文件大?。?/td> 276K
代理商: HY5DV641622AT-5
Rev. 0.7/May. 02
16
HY5DV641622AT
7.
Issue 2 or more Auto Refresh commands.
8.
Issue a Mode Register Set command to initialize the mode register with bit A8 = Low.
Power-Up Sequence
/CLK
CLK
VDD
LDQS,
UDQS
DQ’s
MRS
AREF
PRE
NOP
MRS
EMRS
PRE
NOP
CODE
CODE
CODE
CODE
CODE
CODE
CODE
CODE
CODE
VDDQ
VREF
CKE
CMD
BA0,BA1
A10
ADDR
LDM,UDM
tVTD
T=200usec
tMRD
200 cycles of CK*
tRP
tRFC
Power up
VDD and CK stable
Precharge All
EMRS Set
MRS Set
Reset DLL
(with A8=H)
Precharge All
2 or more
Auto Refresh
MRS Set
(with A8=L)
*200 cycles of CK are required (for DLL locking) before any executable command can be applied.
VTT
tRP
tIS tIH
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