參數(shù)資料
型號: MC94MX21DVKN3R2
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 350 MHz, MICROPROCESSOR, PBGA289
封裝: 14 X 14 MM, 1.41 MM HEIGHT, 0.65 MM PITCH, LEAD FREE, PLASTIC, BGA-289
文件頁數(shù): 40/98頁
文件大小: 1326K
代理商: MC94MX21DVKN3R2
Specifications
MC94MX21 Technical Data, Rev. 1.5
Freescale Semiconductor
45
3.14
Pulse-Width Modulator
The PWM can be programmed to select one of two clock signals as its source frequency. The selected
clock signal is passed through a divider and a prescaler before being input to the counter. The output is
available at the pulse-width modulator output (PWMO) external pin.
Figure 37. PWM Output Timing Diagram
Table 29. PWM Output Timing Parameters
Ref No.
Parameter
1.8 V
± 0.1 V
3.0 V
± 0.3 V
Unit
Minimum
Maximum
Minimum
Maximum
1
System CLK frequency
0
45
0
45
MHz
2a
Clock high time
12.29
12.29
ns
2b
Clock low time
9.91
9.91
ns
3a
Clock fall time
0.5
0.5
ns
3b
Clock rise time
–0.5–0.5
ns
4a
Output delay time
9.37
3.61
ns
4b
Output setup time
8.71
3.03
ns
System Clock
2a
1
PWM Output
3b
2b
3a
4b
4a
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:
MC94MX21DVKN3
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