参数资料
型号: MCIMX31LDVMN5D
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 532 MHz, MICROPROCESSOR, PBGA473
封装: 19 X 19 MM, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MAPBGA-473
文件页数: 44/118页
文件大小: 1083K
代理商: MCIMX31LDVMN5D
Electrical Characteristics
MCIMX31/MCIMX31L Technical Data, Rev. 4.3
Freescale Semiconductor
31
Figure 16. UDMA In Device Terminates Transfer Timing Diagram
Table 27. 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
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