芯片在AVDD=5V,DVDD=3.3V,REFIO连接REF5040,模拟输入悬空的条件下进行工作,上电后ALARM引脚随即输出高电平,为了修复这个问题,我按照手册在SCLK与CS为低电平时拉低RST信号1ms来对芯片进行复位,没有任何效果,且RVS电平并未按手册中所说变为高电平。
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我按照手册在SCLK与CS为低电平时拉低RST信号1ms来对芯片进行复位
To exit any of the RESET states, pull the RST pin high with CONVST/CS and SCLK held low. After a delay of tD_RST_POR or tD_RST_APP (see the Switching Characteristics table), the device enters ACQ state and the RVS pin goes high.
请您参考这个说明。
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您做这个测试处于reset的状态下吗?
To exit any of the RESET states, pull the RST pin high with CONVST/CS and SCLK held low. After a delay of tD_RST_POR or tD_RST_APP (see the Switching Characteristics table), the device enters ACQ state and the RVS pin goes high.
这个部分是推出reset状台,才会这样变化。您测试条件是什么?