MCIMX253DJM4 Freescale, MCIMX253DJM4 Datasheet - Page 66
MCIMX253DJM4
Manufacturer Part Number
MCIMX253DJM4
Description
Manufacturer
Freescale
Datasheet
1.MCIMX253DJM4.pdf
(154 pages)
Specifications of MCIMX253DJM4
Operating Temperature (min)
-20C
Operating Temperature (max)
70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Compliant
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These values are for a DQ/DM slew rate of 1 V/ns and a DQS slew rate of 1 V/ns. For additional values use
DtDH1 Derating Values for DDR2-400, DDR2-533.”
DDR17
DDR18
DDR19
DDR20
DDR21
DDR22
DDR23
ID
DQ & DQM setup time to DQS (single-ended strobe)
DQ & DQM hold time to DQS (single-ended strobe)
Write cycle DQS falling edge to SDCLK output setup time
Write cycle DQS falling edge to SDCLK output hold time
DQS latching rising transitions to associated clock edges
DQS high-level width
DQS low-level width
DQM (output)
DQS (output)
DQ (output)
SDCLK_B
SDCLK
ΔtD
2.0 V/ns
S1
Table 53. ΔtDS1, ΔtDH1 Derating Values for DDR2-400, DDR2-533
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 7
ΔtD
H1
Figure 32. DDR2 SDRAM Write Cycle Timing Diagram
Table 52. DDR2 SDRAM Write Cycle Parameter Table
ΔtD
1.5 V/ns
S1
DDR17
DDR21
DDR17
ΔtD
H1
Parameter
ΔtD
S1
1.0 V/ns
Data
DM
ΔtD
H1
DDR18
DDR18
Data
DM
ΔtD
0.9 V/ns
S1
DQS Single-Ended Slew Rate
ΔtD
H1
DDR17
DDR17
Data
DM
1
1
ΔtD
DDR22
0.8 V/ns
S1
ΔtD
Data
DM
H1
DDR23
ΔtD
S1
0.7 V/ns
DDR18
DDR18
t
t
Symbol
Data
DS1(base)
DH1(base)
DM
t
t
t
t
DQSS
DQSH
t
DQSL
DSS
DSH
ΔtD
H1
ΔtD
S1
0.6 V/ns
Data
DM
DDR19
ΔtD
0.025
0.025
H1
-0.25
Min.
0.35
0.35
0.2
0.2
1,2,3
DDR2-400
Freescale Semiconductor
Data
DM
ΔtD
S1
0.5 Vns
Table
Max.
ΔtD
0.25
H1
Data
DM
—
—
—
—
—
—
DDR20
53, “DtDS1,
ΔtD
S1
0.4 V/ns
Unit
tCK
tCK
tCK
tCK
tCK
ns
ns
ΔtD
H1
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