飞思卡尔MCU时钟模块设置

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1、FreescaleHCS12微控制器MC9S12DP2562005年8月TMFreescaleSemiconductorConfidentialandProprietaryInformation.Freescale™andtheFreescalelogoaretrademarksofFreescaleSemiconductor,Inc.Allotherproductorservicenamesarethepropertyoftheirrespectiveowners.©FreescaleSemiconductor,Inc.

2、2005.CreatedwithSmartPrintertrailversionwww.i-enet.comEnhancedCaptureTimerModule增强型捕捉定时器模块TMFreescaleSemiconductorConfidentialandProprietaryInformation.Freescale™andtheFreescalelogoaretrademarksofFreescaleSemiconductor,Inc.Allotherproductorservicenamesaretheproper

3、tyoftheirrespectiveowners.©FreescaleSemiconductor,Inc.2005.CreatedwithSmartPrintertrailversionwww.i-enet.comECT模块结构•一个16位向上带可编程预分频的主计数器.•一个16位的带可编程预分频的模数向下计数器•8个独立的定时器通道，每个通道具备输入捕捉和输出比较功能•4个8位脉冲累加器，也可设置成2个16位脉冲累加器.•通过对寄存器编程可以实现不同的功能Slide2TMFreescaleSemiconductorCo

4、nfidentialandProprietaryInformation.Freescale™andtheFreescalelogoaretrademarksofFreescaleSemiconductor,Inc.Allotherproductorservicenamesarethepropertyoftheirrespectiveowners.©FreescaleSemiconductor,Inc.2005.CreatedwithSmartPrintertrailversionwww.i-enet.com定时器结构模块时

5、钟计时器溢出时，对溢出标志位预分频选择置位，如允许中断，则向CPUMClock发出中断请求PR[2:0]$FFFE$FFFF$0000***************TOF****1248163264128计数器寄存器TCNT15...........................................0CLKAddressOffset.TCNT$0004,05B0.......……...B7B8……..........B15TENPINDATABUS脉冲累加器TSCR1-定时器控制寄存器TENTSWAITSFR

6、ZTFFCARRRR$0006RST:00000000R=Reserved1–计数器使能0–计数器禁止Slide3TMFreescaleSemiconductorConfidentialandProprietaryInformation.Freescale™andtheFreescalelogoaretrademarksofFreescaleSemiconductor,Inc.Allotherproductorservicenamesarethepropertyoftheirrespectiveowners.©Freesc

7、aleSemiconductor,Inc.2005.CreatedwithSmartPrintertrailversionwww.i-enet.com定时器，预分频，计数器寄存器:16位自由运行/模计数器B15............................................................................................................................…B0AddressOffset1.TCNT$0004,$0005RS

8、T:0........................................................................................................................0B7..........................