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參數(shù)資料
| 型號： | MCIMX31VMN5CR2 |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 532 MHz, MICROPROCESSOR, PBGA473 |
| 封裝： | 19 X 19 MM, 0.80 MM PITCH, ROHS COMPLIANT, MAPBGA-473 |
| 文件頁數(shù)： | 55/122頁 |
| 文件大小： | 1418K |
| 代理商： | MCIMX31VMN5CR2 |
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MCIMX31/MCIMX31L Technical Data, Rev. 4.1
38
Freescale Semiconductor
Electrical Characteristics
4.3.9
EMI Electrical Specifications
This section provides electrical parametrics and timings for EMI module.
4.3.9.1
NAND Flash Controller Interface (NFC)
The NFC supports normal timing mode, using two flash clock cycles for one access of RE and WE. AC
timings are provided as multiplications of the clock cycle and fixed delay. Figure 23, Figure 24, Figure 25,
and Figure 26 depict the relative timing requirements among different signals of the NFC at module level,
for normal mode, and Table 32 lists the timing parameters.
Figure 23. Command Latch Cycle Timing DIagram
Phase lock time
—
100
s
In addition to the frequency
Maximum allowed PLL supply voltage ripple
—
25
mV
Fmodulation < 50 kHz
Maximum allowed PLL supply voltage ripple
—
20
mV
50 kHz < Fmodulation < 300 kHz
Maximum allowed PLL supply voltage ripple
—
25
mV
Fmodulation > 300 kHz
PLL output clock phase jitter
—
5.2
ns
Measured on CLKO pin
PLL output clock period jitter
—
420
ps
Measured on CLKO pin
1 The user or board designer must take into account that the use of a frequency other than 26 MHz would require adjustment to
the DPTC–DVFS table, which is incorporated into operating system code.
2 The PLL reference frequency must be
≤ 35 MHz. Therefore, for frequencies between 35 MHz and 70 MHz, program the
predivider to divide by 2 or more. If the CKIH frequency is above 70 MHz, program the predivider to 3 or more. For PD bit
description, see the reference manual.
Table 31. DPLL Specifications (continued)
Parameter
Min
Typ
Max
Unit
Comments
NFCLE
NFCE
NFWE
NFALE
NFIO[7:0]
Command
NF9
NF8
NF1
NF2
NF5
NF3
NF4
NF6
NF7
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
i.MX31
Product
Family
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