DSP should know 157 questions most. How do you mix the four? 5V/3.3 V? The development of TI DSP is the same as the development of integrated circuits. The new DSP is 3.3 V, but many of the peripheral circuits are currently 5V, so in DSP system, there are often 5V and 3.3V DSP mixing problems. In these systems, note: 1)DSP output to 5V circuits (such as D/A), without any buffer circuit, can be directly connected. 2)DSP input 5V signal (such as A/D), due to the voltage of input signal > 4V, exceeding the power supply voltage of DSP, the external signal of DSP has no protection circuit and needs to be buffered, such as 74LVC245, to convert 5V signal into 3.3V signal. 3) the JTAG port of the emulator must also have a signal of 3.3 V, otherwise it may damage the DSP. 5. Why do you want to have a large DSP with large RAM?

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做DSP最应该懂得157个问题（回答）.doc

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