Part Number:CC1310
CC1310 (RHB)5×5封装的芯片的DIO_7,在未初始化IO口模式的时候,是保持什么状态?
如果未配置的引脚连接到具有不同电压点位的节点,是否会有漏电流产生?
Kevin Qiu1:
Unused I/O Pins By default, the I/O driver (output) and input buffer (input) are disabled (tri-state mode) at power on or reset, and thus the I/O pin can safely be left unconnected (floating). If the I/O pin is in a tri-state condition and connected to a node with a different voltage potential, a small leakage current can go through the pin. The same applies to an I/O pin configured as input, where the pin is connected to a voltage source (for example VDD/2). The input is then an undefined value of either 0 or 1.
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user5360734:
按照文档的说法,维持在三态的引脚,如果该引脚的电平和与之相连的引脚的电平一致,是不是就不会存在漏电?
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Kevin Qiu1:
不,处于三态状态的IO连接到具有不同电压电位的引脚,会有少量漏电流通过该引脚
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user5360734:
1、连接到相同电压点位的引脚应该就不会漏电了吧
2、RESET_N脚的电平是不是跟随供电电压的?
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Kevin Qiu1:
1.是的
2.是的,可查看原理图,采用外部上拉
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user5360734:
请问这个漏电流的大小如何计算呢?
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Kevin Qiu1:
漏电流和电压有关,不是确定的,没有办法计算
你可以用直流电源分析仪测量