文件名称:dspjtag
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J T AG 接口插座与DSP芯片的距离:为了保证JTAG信号不受干扰，需
要注意两者之间的距离不超过六英寸(15甲24厘米)，超过这个距离，就需要在中
间加缓冲芯片。本设计中使用了244作为缓冲芯片，但其原因不是由于器件之间
距离过长，而是考虑到仿真器工作在5V电压，DSP引脚为3.3V，为了电平兼容
性而进行的电压转换功能。-JT AG socket interface with DSP chips Distance: JTAG signals in order to guarantee uninterrupted, need to pay attention to the distance between the two is not more than 6 inches (15 A 24 centimeters), more than this distance, we need to increase the buffer between chips. This design was used as a buffer chip 244, but its not because the distance between devices is too long, but taking into account the work in the simulator 5V Voltage, DSP-pin to 3.3V, in order to conduct the compatibility level of the voltage conversion function.
要注意两者之间的距离不超过六英寸(15甲24厘米)，超过这个距离，就需要在中
间加缓冲芯片。本设计中使用了244作为缓冲芯片，但其原因不是由于器件之间
距离过长，而是考虑到仿真器工作在5V电压，DSP引脚为3.3V，为了电平兼容
性而进行的电压转换功能。-JT AG socket interface with DSP chips Distance: JTAG signals in order to guarantee uninterrupted, need to pay attention to the distance between the two is not more than 6 inches (15 A 24 centimeters), more than this distance, we need to increase the buffer between chips. This design was used as a buffer chip 244, but its not because the distance between devices is too long, but taking into account the work in the simulator 5V Voltage, DSP-pin to 3.3V, in order to conduct the compatibility level of the voltage conversion function.
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dspjtag.pdf