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<?xml-stylesheet type="text/xsl" href="https://devzone.nordicsemi.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>PWM without DMA - to save current?</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/42521/pwm-without-dma---to-save-current</link><description>I am using an RTC to periodically kick off a PWM pulse train. This all works beautifully, but draws far more current than expected. From what I&amp;#39;ve read, this is because the EasyDMA draws over 1mA. I think I know the answer, but want to confirm: can I</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Tue, 15 Jan 2019 08:55:53 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/42521/pwm-without-dma---to-save-current" /><item><title>RE: PWM without DMA - to save current?</title><link>https://devzone.nordicsemi.com/thread/165660?ContentTypeID=1</link><pubDate>Tue, 15 Jan 2019 08:55:53 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:533542f1-e8f8-4610-ba9c-5ece6edc1a6d</guid><dc:creator>Simonr</dc:creator><description>&lt;p&gt;Hi&amp;nbsp;&lt;span&gt;Al&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span&gt;My colleague is correct in that you can&amp;#39;t disable the DMA. As long as the PWM-peripheral runs, so does the DMA. You may use the low power DMA library to reduce the current draw significantly, but this will result in a less accurate DMA. Otherwise you will just have to turn off the PWM-peripheral whenever it isn&amp;#39;t used to decrease the current consumption. I am sorry for the bad news.&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span&gt;Best regards,&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span&gt;Simon&lt;/span&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>