Technical data

Electrical Characteristics
MCIMX31C/MCIMX31LC Technical Data, Rev. 4.3
Freescale Semiconductor 23
4.3.5.2 PIO Mode Timing
Figure 10 shows timing for PIO read, and Table 22 lists the timing parameters for PIO read.
Figure 10. PIO Read Timing Diagram
Figure 11 shows timing for PIO write, and Table 23 lists the timing parameters for PIO write.
tskew5 Max difference in cable propagation delay between (ata_dior, ata_diow, ata_dmack) and
ata_cs0, ata_cs1, ata_da2, ata_da1, ata_da0, ata_data(write)
cable
tskew6 Max difference in cable propagation delay without accounting for ground bounce cable
1
Values provided where applicable.
Table 22. PIO Read Timing Parameters
ATA
Parameter
Parameter
from Figure 10
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
Table 21. ATA Timing Parameters (continued)
Name Description
Value/
Contributing Factor
1