TI中文支持网Part Number:DAC71408
Dear TI engineer,
I have been using LAUNCHXL_F28379D to communicate with DAC71408 and have been having communication problems. May I ask whether the two SPI signals are at the same level? Do I need to add a level switching chip to the circuit?
Amy Luo：
您好，
DAC71408的SPI电平标准是VIO电压，您使用的VIO电压是多少？
您可以看下 LAUNCHXL_F28379D的SPI电平是多少？或者实际测量下其输出的高电平电压看是多少？
LAUNCHXL_F28379D的SPI电平需与DAC71408的SPI电平相兼容，否则的话不能正常通信。
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? ??：
The VIO pin voltage I used is 3.3V, and the CLK pin voltage of LaunchPad measured by oscilloscope is also 3.3V. Is this correct?
,
Amy Luo：
Yes, they can communicate with each other properly if they are all 3.3V. If communication does not work properly, it should be a problem elsewhere
