参数资料
型号: MCIMX31VMN5CR2
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 532 MHz, MICROPROCESSOR, PBGA473
封装: 19 X 19 MM, 0.80 MM PITCH, ROHS COMPLIANT, MAPBGA-473
文件页数: 50/122页
文件大小: 1418K
代理商: MCIMX31VMN5CR2
Electrical Characteristics
MCIMX31/MCIMX31L Technical Data, Rev. 4.1
Freescale Semiconductor
33
Figure 17. UDMA In Device Terminates Transfer Timing Diagram
Table 28. UDMA In Burst Timing Parameters
ATA
Parameter
from
Description
Controlling Variable
tack
tack (min) = (time_ack * T) – (tskew1 + tskew2)
time_ack
tenv
tenv (min) = (time_env * T) – (tskew1 + tskew2)
tenv (max) = (time_env * T) + (tskew1 + tskew2)
time_env
tds
tds1
tds – (tskew3) – ti_ds > 0
tskew3, ti_ds, ti_dh
should be low enough
tdh
tdh1
tdh – (tskew3) – ti_dh > 0
tcyc
tc1
(tcyc – tskew) > T
T big enough
trp
trp (min) = time_rp * T – (tskew1 + tskew2 + tskew6)
time_rp
—tx11
1 There is a special timing requirement in the ATA host that requires the internal DIOW to go only high 3 clocks after the last
active edge on the DSTROBE signal. The equation given on this line tries to capture this constraint.
2. Make ton and toff big enough to avoid bus contention
(time_rp * T) – (tco + tsu + 3T + 2 *tbuf + 2*tcable2) > trfs (drive)
time_rp
tmli
tmli1
tmli1 (min) = (time_mlix + 0.4) * T
time_mlix
tzah
tzah (min) = (time_zah + 0.4) * T
time_zah
tdzfs
tdzfs = (time_dzfs * T) – (tskew1 + tskew2)
time_dzfs
tcvh
tcvh = (time_cvh *T) – (tskew1 + tskew2)
time_cvh
—ton
toff
ton = time_on * T – tskew1
toff = time_off * T – tskew1
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
i.MX31
Product
Family
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