参数资料
型号: MC9328MX21SVMR2
厂商: Freescale Semiconductor
文件页数: 31/88页
文件大小: 0K
描述: IC MPU I.MX21S 289-MAPBGA
标准包装: 1,000
系列: i.MX21
核心处理器: ARM9
芯体尺寸: 32-位
速度: 266MHz
连通性: 1 线,EBI/EMI,I²C,IrDA,MMC,智能卡,SPI,SSI,UART/USART,USB OTG
外围设备: DMA,I²S,LCD,POR,PWM,WDT
输入/输出数: 192
程序存储器类型: ROMless
电压 - 电源 (Vcc/Vdd): 1.45 V ~ 3.3 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 289-LFBGA
包装: 带卷 (TR)
Specifications
MC9328MX21S Technical Data, Rev. 1.3
Freescale Semiconductor
37
3.13
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 29. PWM Output Timing Diagram
Table 25. 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 frequency1
1. CL of PWMO = TBD
045045
MHz
2a
Clock high time1
12.29
12.29
ns
2b
Clock low time1
9.91
–9.91–
ns
3a
Clock fall time1
–0.5–0.5
ns
3b
Clock rise time1
–0.5–0.5
ns
4a
Output delay time1
9.37
–3.61–
ns
4b
Output setup time1
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:
i.MX21
Product
Family
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