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CC3200-LAUNCHXL PWM输出频率

user6239050
Prodigy 50 points
Other Parts Discussed in Thread: CC3200-LAUNCHXL

TI工程师们，

1. 目前想使用CC3200-LAUNCHXL 上的SPI端口读取双声道PDM数字麦的数据， SPI时钟频率需要达到约10MHz，能否通过TIMER分频出约5MHz的PWM信号作为麦克风的时钟源呢？

2. 如果1.可行的话， 在SPI以10MHz的时钟频率读取数据并通过DMA将数据传入的同时，还能否同时使用I2C读取另一传感器的数据(100~200Hz)？

谢谢

  • 0
    TI__Guru**** 188340 points
    1、可以，SPI本身就提供时钟分频： The SPI module also includes a programmable bit rate clock divider to generate the output serial clock derived from the input clock of the SPI module. Bit rates are generated based on the input clock, and the maximum bit rate is determined by the connected peripheral

    2、I2C跟SPI是独立模块，不会互相影响

    具体请参考：www.ti.com/.../swru367