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MCIMX25 Datasheet(PDF) 46 Page - Freescale Semiconductor, Inc |
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MCIMX25 Datasheet(HTML) 46 Page - Freescale Semiconductor, Inc |
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46 / 140 page  i.MX25 Applications Processor for Automotive Products, Rev. 8 46 Freescale Semiconductor To meet PIO read mode timing requirements, a number of timing parameters must be controlled. Table 36 shows timing parameters and their determining relations, and indicates parameters that can be adjusted to meet required conditions. Figure 12 gives timing waveforms for PIO write mode. Figure 12. PIO Write Mode Timing Table 36. Timing Parameters for PIO Read Mode ATA Parameter PIO Read Mode Timing Parameter1 1 See Figure 11. Relation Adjustable Parameter 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_9 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 ADDR (See note 1) DIOW Write Data(15:0) IORDY IORDY t1 t2w t9 tA buffer_en ton t4 toff tB DIOR t1 |
Similar Part No. - MCIMX25_11 |
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Similar Description - MCIMX25_11 |
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