Toybrick
标题:
RK3399PRO开发板RTC接口
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作者:
misaya
时间:
2019-6-24 10:28
标题:
RK3399PRO开发板RTC接口
贵司技术部的开发人员,您们好。
想请教一下有关RK3399PRO开发板RTC接口的问题:1、根据官网的硬件说明,在开发板上是有一路RTC接口,
RTC
1路RTC接口
但为在开发板上找到,且官网所提公的原理图上也没有关于RTC的接口,只是有关于RTC的电源网络,从BULK芯片NB679GD的LDO输出一路VCC_RTC_S5电源给到RK809电源管理芯片的45管脚,但未外接电池供电,在系统电源掉电后,该如何进行日志存储。
2、查阅RK809相关的资料,描述如下:
4.6 REAL TIME CLOCK (RTC)
The RK809 integrates a crystal oscillator buffer and a real time clock (RTC). The buffer
RK809 Datasheet Rev 1.01
Copyright ©2018 Fuzhou Rockchip Electronics Co., Ltd. 22
works with an external 32.768kHz crystal oscillator. With the RTC function, the PMIC provides second/minute/hour/day/month/year information, alarm wake up as well as time calibration. The RK817 provides one channel of 32.768kHz clocks with open drain outputs, where it is default on and is controlled through I2C interface.
4.7 RC OSCILLATOR
The RK809 integrates an RC oscillator. If the external crystal oscillator is not connected, the chip will be driven by the internal RC oscillator. Without external crystal oscillator , the system costs can be saved, but the RTC and the fuel gauge will be inaccurate.
3、在咨讯贵司淘宝客服后,客服提示需要飞来实施rtc功能,但未具体描述实施方案,
所以想咨询一下贵司的RD人员,如需要使用开发板的RTC功能该如何做,是否需要外接纽扣电池及专业的日志管理芯片,并通过i2c总线来与RK3399PRO通信来实现RTC功能。
烦请贵司技术人员能提供相应的解决方案,谢谢。
作者:
YML001
时间:
2024-8-20 20:46
楼主问题解决了吗,怎么操作的,求指教
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