參數(shù)資料
型號(hào)： MCIMX258CVM4
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 400 MHz, MICROPROCESSOR, PBGA400
封裝： 17 X 17 MM, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MAPBGA-400
文件頁數(shù)： 96/154頁
文件大小： 1498K
代理商： MCIMX258CVM4
i.MX25 Applications Processor for Consumer and Industrial 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
Relation
Adjustable Parameter
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(min.) = time_9
× T – (tskew1 + tskew2 + tskew6)
time_9
t5
t5(min.) = tco + tsu + tbuf + tbuf + tcable1 + tcable2
If not met, increase time_2
t6
0
—
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
t1
t2w
t9
tA
buffer_en
ton
t4 toff
tB
DIOR
t1
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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