MCIMX355AVM5B Freescale, MCIMX355AVM5B Datasheet - Page 107
MCIMX355AVM5B
Manufacturer Part Number
MCIMX355AVM5B
Description
Manufacturer
Freescale
Datasheet
1.MCIMX355AVM5B.pdf
(148 pages)
Specifications of MCIMX355AVM5B
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Compliant
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2. Make ton and toff large enough to avoid bus contention.
Freescale Semiconductor
There is a special timing requirement in the ATA host that requires the internal DIOW to go high three clocks after the last active
edge on the DSTROBE signal. The equation given on this line tries to capture this constraint.
Parameter
tdzfs
ATA
tenv
tzah
tack
tcyc
tcvh
tmli
tds
tdh
trp
—
—
Parameters
Figure
Figure
Figure 82
from
tdzfs
tmli1
tds1
tdh1
tzah
tack
tenv
tx1
tcvh
tc1
ton
toff
trp
Figure 82. UDMA-In Device Terminates Transfer Timing Diagram
1
80,
81,
i.MX35 Applications Processors for Automotive Products, Rev. 9
tack (min.) = (time_ack × T) – (tskew1 + tskew2)
tenv (min.) = (time_env × T) – (tskew1 + tskew2)
tenv (max.) = (time_env × T) + (tskew1 + tskew2)
tds – (tskew3) – ti_ds > 0
tdh – (tskew3) – ti_dh > 0
(tcyc – tskew > T
trp (min.) = time_rp × T – (tskew1 + tskew2 + tskew6)
(time_rp × T) – (tco + tsu + 3T + 2 × tbuf + 2 × tcable2) > trfs (drive)
tmli1 (min.) = (time_mlix + 0.4) × T
tzah (min.) = (time_zah + 0.4) × T
tdzfs = (time_dzfs × T) – (tskew1 + tskew2)
tcvh = (time_cvh × T) – (tskew1 + tskew2)
ton = time_on × T – tskew1
toff = time_off × T – tskew1
Table 69. UDMA-In Burst Timing Parameters
Description
should be low enough
Controlling Variable
tskew3, ti_ds, ti_dh
T big enough
time_dzfs
time_mlix
time_ack
time_env
time_zah
time_cvh
time_rp
time_rp
—
107
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