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IMX35 датащи(PDF) 52 Page - Freescale Semiconductor, Inc

номер детали IMX35
подробное описание детали  i.MX35 Applications Processors for Industrial and Consumer Products
PDF  148 Pages
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производитель  FREESCALE [Freescale Semiconductor, Inc]
домашняя страница  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

IMX35 датащи(HTML) 52 Page - Freescale Semiconductor, Inc

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i.MX35 Applications Processors for Industrial and Consumer Products, Rev. 6
Freescale Semiconductor
52
Figure 32. DDR2 SDRAM Write Cycle Timing Diagram
NOTE
These values are for DQ/DM slew rate of 1 V/ns and DQS slew rate of
1 V/ns. For different values use the derating table.
Figure 33. DDR2 SDRAM Write Cycle Parameters
ID
PARAMETER
Symbol
DDR2-400
Unit
Min
Max
DDR17 DQ and DQM setup time to DQS (single-ended strobe)
tDS1(base)
0.025
—
ns
DDR18 DQ and DQM hold time to DQS (single-ended strobe)
tDH1(base)
0.025
—
ns
DDR19 Write cycle DQS falling edge to SDCLK output setup time.
tDSS
0.2
—
tCK
DDR20 Write cycle DQS falling edge to SDCLK output hold time.
tDSH
0.2
—
tCK
DDR21 DQS latching rising transitions to associated clock edges
tDQSS
–0.25
0.25
tCK
DDR22 DQS high level width
tDQSH
0.35
—
tCK
DDR23 DQS low level width
tDQSL
0.35
—
tCK
SDCLK
SDCLK_B
DQS (output)
DQ (output)
DQM (output)
Data
Data
Data
Data
Data
Data
Data
Data
DM
DM
DM
DM
DM
DM
DM
DM
DDR17
DDR17
DDR17
DDR17
DDR18
DDR18
DDR18
DDR18
DDR19
DDR20
DDR21
DDR23
DDR22



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