MCIMX31_07 Datasheet, PDF (23/108 Pages) Freescale Semiconductor, Inc – Multimedia Applications Processors

Electrical Characteristics
Table 21. PIO Read Timing Parameters
ATA
Parameter
Parameter from Figure 9
Value
Controlling
Variable
t1
t1
t1 (min) = time_1 * T - (tskew1 + tskew2 + tskew5)
time_1
t2
t2r
t2 min) = time_2r * T - (tskew1 + tskew2 + tskew5)
time_2r
t9
t9
t9 (min) = time_9 * T - (tskew1 + tskew2 + tskew6)
time_3
t5
t5
t5 (min) = tco + tsu + tbuf + tbuf + tcable1 + tcable2
If not met, increase
time_2
t6
t6
0
–
tA
tA
tA (min) = (1.5 + time_ax) * T - (tco + tsui + tcable2 + tcable2 + 2*tbuf)
time_ax
trd
trd1
trd1 (max) = (-trd) + (tskew3 + tskew4)
trd1 (min) = (time_pio_rdx - 0.5)*T - (tsu + thi)
(time_pio_rdx - 0.5) * T > tsu + thi + tskew3 + tskew4
time_pio_rdx
t0
–
t0 (min) = (time_1 + time_2 + time_9) * T
time_1, time_2r, time_9
Figure 10 shows timing for PIO write, and Table 22 lists the timing parameters for PIO write.
Figure 10. Multiword DMA (MDMA) Timing
Table 22. PIO Write Timing Parameters
ATA
Parameter
Parameter from Figure 10
Value
t1
t1
t1 (min) = time_1 * T - (tskew1 + tskew2 + tskew5)
t2
t2w
t2 (min) = time_2w * T - (tskew1 + tskew2 + tskew5)
t9
t9
t9 (min) = time_9 * T - (tskew1 + tskew2 + tskew6)
t3
–
t3 (min) = (time_2w - time_on)* T - (tskew1 + tskew2 +tskew5)
t4
t4
t4 (min) = time_4 * T - tskew1
tA
tA
tA = (1.5 + time_ax) * T - (tco + tsui + tcable2 + tcable2 + 2*tbuf)
Freescale Semiconductor
i.MX31/i.MX31L Advance Information, Rev. 2.3
Controlling
Variable
time_1
time_2w
time_9
If not met, increase
time_2w
time_4
time_ax
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