MCIMX31_07 Datasheet, PDF (25/108 Pages) Freescale Semiconductor, Inc – Multimedia Applications Processors

ATA
Parameter
t0
tg(read)
tf(read)
tg(write)
tf(write)
tL
tn, tj
–
Electrical Characteristics
Table 23. MDMA Read and Write Timing Parameters (continued)
Parameter
from
Figure 11,
Figure 12
Value
–
t0 (min) = (time_d + time_k) * T
tgr
tgr (min-read) = tco + tsu + tbuf + tbuf + tcable1 + tcable2
tgr.(min-drive) = td - te(drive)
tfr
tfr (min-drive) = 0
–
tg (min-write) = time_d * T - (tskew1 + tskew2 + tskew5)
–
tf (min-write) = time_k * T - (tskew1 + tskew2 + tskew6)
–
tL (max) = (time_d + time_k-2)*T - (tsu + tco + 2*tbuf + 2*tcable2)
tkjn
tn= tj= tkjn = (max(time_k,. time_jn) * T - (tskew1 + tskew2 + tskew6)
ton
ton = time_on * T - tskew1
toff
toff = time_off * T - tskew1
Controlling
Variable
time_d, time_k
time_d
–
time_d
time_k
time_d, time_k
time_jn
–
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
i.MX31/i.MX31L Advance Information, Rev. 2.3
Freescale Semiconductor
25