MCIMX255AJM4A Freescale, MCIMX255AJM4A Datasheet - Page 45

• Manufacturer Part Number: MCIMX255AJM4A
• Manufacturer: Freescale

Specifications of MCIMX255AJM4A

• Lead Free Status / RoHS Status: Compliant

Figure 12
To meet PIO write mode timing requirements, a number of timing parameters must be controlled.
shows timing parameters and their determining relations, and indicates parameters that can be adjusted to
meet required conditions.
1
Freescale Semiconductor
Parameter
See
ATA
tA
—
—
t1
t2
t9
t3
t4
t0
Figure
gives timing waveforms for PIO write mode.
12.
Mode Timing
Parameter
PIO Write
t2w
—
tA
—
—
—
t1
t9
t4
1
Write Data(15:0)
i.MX25 Applications Processor for Automotive Products, Rev. 4
t1(min.) = time_1
t2(min.) = time_2w
t9(min.) = time_9
t3(min.) = (time_2w – time_on)
t4(min.) = time_4
tA = (1.5 + time_ax) T – (tco + tsui + tcable2 + tcable2 + 2 tbuf)
t0(min.) = (time_1 + time_2 + time_9)
Avoid bus contention when switching buffer on by making ton long
enough
Avoid bus contention when switching buffer off by making toff long
enough
ADDR
(See note 1)
buffer_en
Table 35. Timing Parameters for PIO Write Mode
DIOR
DIOW
IORDY
IORDY
Figure 12. PIO Write Mode Timing
T – (tskew1 + tskew2 + tskew5)
T – (tskew1 + tskew2 + tskew6)
T – tskew1
T – (tskew1 + tskew2 + tskew5)
t1
Relation
ton
tA
T – (tskew1 + tskew2 +tskew5)
T
t2w
tB
t4 toff
t9
t1
if not met, increase time_2w
Adjustable Parameter(s)
time_1, time_2r, time_9
time_2w
time_ax
time_9
time_4
time_1
—
—
Table 35
45