imx6Ul RTC

小辉哥 — Wed, 29 Aug 2018 09:53:15 GMT

你好，imx6ul rtc 电池供电的时候那个R1 ，1k电阻是做什么用的，为什么要加一个电阻，可以去掉吗？

Re: imx6Ul RTC

Yuri — Thu, 30 Aug 2018 04:04:13 GMT

Hello,

The resistor is intended to restrict charge current, if chargeable battery is applied:

“Appropriate series resistor (Rs) must be used when connecting the coin cell. Rs depends

on the charge current limit that depends on the chosen coin cell.”

Refer to section, named OSC32K in i.MX 6UL Datasheet(s), for more details.

So, the Rs resistor may be removed if non- chargeable battery is used in Your design.

Note, if diode D2 is used, R1 resistor is not required and vice versa.

Have a great day,

Yuri

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