[讨论]

LPS331AP供电方式以1HZ 0-3.3V供电有人碰到过吗？

2018-10-24 09:31:14 2791 压力传感器

0 `LPS331AP供电（VCC）脚接的是STM32F100C8T6B 的第二脚波形如图：补充： “STM32F100C8T6B 的第二脚”功能：主要功能“PC13(6)：Main function after the first backup domain power-up. Later on, it depends on the contents of the Backup registers even after reset (because these registers are not reset by the main reset). For details on how to manage these IOs, refer to the Battery backup domain and BKP register description sections in the STM32F10xxx reference manual, available from the STMicroelectronics website: www.st.com.” 脚名称：“PC13-TAMPERRTC(5)：PC13, PC14 and PC15 are supplied through the power switch and since the switch only sinks a limited amount of current (3 mA), the use of GPIOs PC13 to PC15 in output mode is restricted: the speed should not exceed 2 MHz with a maximum load of 30 pF and these IOs must not be used as a current source (e.g. to drive an LED).” 对软件不怎么懂所以全盘贴上了！ ` 0
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0 这个传感器的供电方式是这样的？大家有谁见过吗？我测的是老外的PCB，感到特别奇怪，请大家帮忙看看，先谢谢了！

2018-10-24 09:33:28 评论举报 1^# yan wuhua