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启动期间UART 3.3V脉冲
https://support.dialog-semiconductor.com/forums/post/dialog-smartbond-bluetooth-low-energy-%E2%80%93-hardware-device-reference-designs/uart-33v-pulse
< div class = "字段field-name-taxonomy-forums field-type-taxonomy-term-reference field-label-above”> < div class = "字段标签" >论坛:,< / div > < div class = "字段条目" > < div class =”field-item甚至“rel = " sioc: has_container " > < a href = " /论坛/ dialog-smartbond-bluetooth-low-energy - % E2 % 80% 93 -硬件-设备-引用-设计”“= " sioc:容器sioc:Forum" property="rdfs:label skos:prefLabel" datatype="">Dialog Smartbond Bluetooth Low Energy - Hardware (device &参考设计)< / > < / div > < / div > < / div > < div class =”字段field-name-body field-type-text-with-summary field-label-hidden”> < div class = "字段条目" > < div class =”field-item甚至“财产=“内容:编码”> < p >我们所有的GPIO配置为运行在1.8 v,但是看起来引导ROM uart为3.3 v配置吗?当DA14681部分复位,并寻找启动源时,我们在P1.3 UART TX线上看到3.3V脉冲。(获取附加范围。)我们有设备连接到这些引脚,运行的1.8V电源,并不是3.3V容忍。我们还没有运行产品引导流,因为我们仍在开发中。我们正在从QSPI flash部分启动。两个问题:
有办法修复这个现在,使我们从来没有看到这些3.3V脉冲?
当我们进入生产,这些脉冲将永远不会发生,因为我们将从QSPI引导?
2017年8月23日星期三07:07:34 +0000
chris.arney
84161年https://support.dialog-semiconductor.com
https://support.dialog-semiconductor.com/forums/post/dialog-smartbond-bluetooth-low-energy-%E2%80%93-hardware-device-reference-designs/uart-33v-pulse#comments