MPC5121E datasheet(47/86 Pages) FREESCALE

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Electrical and Thermal Characteristics

MPC5121E/MPC5123 Data Sheet, Rev. 1

Freescale Semiconductor

In PIO write mode, timing waveforms are somewhat different as shown in Figure 25.

Figure 25. PIO Write Mode Timing

To fulfill this timing, several parameters need to be observed as shown in Table 3-27.

t5(min) = tco + tsu + tbuf + tbuf + tcable1 + tcable2

If not met, increase time_2r

A9.23

—

A9.24

tA(min) = (1.5 + time_ax) * T -

(tco + tsui + tcable2 + tcable2 + 2*tbuf)

calculate and programming

time_ax, see Reference

Manual

A9.25

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

calculate and programming

time_pio_rdx, see Reference

Manual

A9.26

—

t0(min) = (time_1 + time_2 + time_9) * T

time_1, time_2r, time_9

A9.27

Table 3-26. Timing Parameters PIO Read (continued)

ATA

Parameter

PIO Read

Mode Timing

Parameter

Value

How to meet

SpecID

ADDR

DIOR

Write Data (15:0)

IORDY

t2r

DIOW

buffer_en

ton

toff

Preliminary

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