參數(shù)資料
型號: MCIMX31_07
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: Multimedia Applications Processors
中文描述: 多媒體應用處理器
文件頁數(shù): 25/108頁
文件大?。?/td> 1235K
代理商: MCIMX31_07
Electrical Characteristics
i.MX31/i.MX31L Advance Information, Rev. 2.3
Freescale Semiconductor
25
4.3.5.3
UDMA In Timing
Figure 13
shows timing when the UDMA in transfer starts,
Figure 14
shows timing when the UDMA in
host terminates transfer,
Figure 15
shows timing when the UDMA in device terminates transfer, and
Table 24
lists the timing parameters for UDMA in burst.
Figure 13. UDMA In Transfer Starts Timing Diagram
t0
t0 (min) = (time_d + time_k) * T
time_d, time_k
tg(read)
tgr
tgr (min-read) = tco + tsu + tbuf + tbuf + tcable1 + tcable2
tgr.(min-drive) = td - te(drive)
time_d
tf(read)
tfr
tfr (min-drive) = 0
tg(write)
tg (min-write) = time_d * T - (tskew1 + tskew2 + tskew5)
time_d
tf(write)
tf (min-write) = time_k * T - (tskew1 + tskew2 + tskew6)
time_k
tL
tL (max) = (time_d + time_k-2)*T - (tsu + tco + 2*tbuf + 2*tcable2)
time_d, time_k
tn, tj
tkjn
tn= tj= tkjn = (max(time_k,. time_jn) * T - (tskew1 + tskew2 + tskew6)
time_jn
ton
toff
ton = time_on * T - tskew1
toff = time_off * T - tskew1
Table 23. MDMA Read and Write Timing Parameters (continued)
ATA
Parameter
Parameter
from
Figure 11
,
Figure 12
Value
Controlling
Variable
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