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你好，
CC2541采用外部可调数字电源供电，分别从3V、2.9V、2.8V三个档位测量同一个外部稳定电压1V
也可参考这个link
https://e2e.ti.com/support/wireless-connectivity/bluetooth-group/bluetooth/f/bluetooth-forum/478461/how-to-connect-an-external-voltage-reference-to-cc2640
图片这个板子，从哪里可以外接供电呢？
根据数据手册显示 （也看一下电源管理模式）
https://www.ti.com.cn/cn/lit/ds/symlink/cc2541.pdf?ts=1710146143828&ref_url=https%253A%252F%252Fwww.ti.com.cn%252Fproduct%252Fcn%252FCC2541%253F_ticdt%253DMTcxMDE0NjA5NXwwMTg5ZDkzNGE2NDkwMDE0ZDc2MjlhYWYxNjdhMDUwNmYwMDJmMDY3MDA3ZTh8R0ExLjEuMzY0NDMyNjk5LjE2OTE1Njc4NjV8bnVsbHxudWxsfEdTMS4xLjE3MTAxNDU5OTAuMzgyLjEuMTcxMDE0NjA5NS4wLjAuMHxHUzEuMS4xNzA5MDA1MTk3LjMuMC4xNzA5MDA1MTk4LjAuMC4wfEdTMS4xLjE3MDY3NTU3NzEuMy4wLjE3MDY3NTU3NzMuMC4wLjB8bnVsbA
你可以看下述pin脚
还可以使用USB口供电试一下
宽泛的电源电压范围 (2 V–3.6 V)
由于CC2541型号过老，支持较为有限
