參數(shù)資料
型號(hào): MCIMX514AJM6C
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: SPECIALTY MICROPROCESSOR CIRCUIT, PBGA529
封裝: 19 X 19 MM, 0.8 MM PITCH, ROHS COMPLIANT, BGA-529
文件頁數(shù): 23/172頁
文件大?。?/td> 2218K
代理商: MCIMX514AJM6C
Electrical Characteristics
i.MX51A Automotive and Infotainment Applications Processors, Rev. 4
Freescale Semiconductor
119
Figure 79. UDMA In Device Terminates Transfer Timing Diagram
Table 95. 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.
(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
toff2
2 Make ton and toff big enough to avoid bus contention.
ton = time_on
× T – tskew1
toff = time_off
× T – tskew1
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