https://community.nxp.com/t5/Other-NXP-Products/SC18IM704-sleep-mode/m-p/1819388#M21458 <P>Hi everyone! Beyond all the issues reported about latest firmware 1.0.2, I found that -in my case, with all the registers in their default values-, entering Sleep Mode (x5A,x5A,xA5,x50), causes the bridge transmit endless null characters (0x00) until it receives any character through UART.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Tix00_0-1709282347492.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/265988i804186B595A84C5E/image-size/medium?v=v2&amp;px=400" role="button" title="Tix00_0-1709282347492.png" alt="Tix00_0-1709282347492.png" /></span></P><P>This behaviour is not described in the datasheet. Is it OK????</P><P>Many thanks in advance.</P> Fri, 01 Mar 2024 08:40:33 GMT Tix00 2024-03-01T08:40:33Z https://community.nxp.com/t5/Other-NXP-Products/SC18IM704-sleep-mode/m-p/1819388#M21458 <P>Hi everyone! Beyond all the issues reported about latest firmware 1.0.2, I found that -in my case, with all the registers in their default values-, entering Sleep Mode (x5A,x5A,xA5,x50), causes the bridge transmit endless null characters (0x00) until it receives any character through UART.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Tix00_0-1709282347492.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/265988i804186B595A84C5E/image-size/medium?v=v2&amp;px=400" role="button" title="Tix00_0-1709282347492.png" alt="Tix00_0-1709282347492.png" /></span></P><P>This behaviour is not described in the datasheet. Is it OK????</P><P>Many thanks in advance.</P> Fri, 01 Mar 2024 08:40:33 GMT https://community.nxp.com/t5/Other-NXP-Products/SC18IM704-sleep-mode/m-p/1819388#M21458 Tix00 2024-03-01T08:40:33Z https://community.nxp.com/t5/Other-NXP-Products/SC18IM704-sleep-mode/m-p/1820263#M21475 <P>Hi Vicent,</P> <P>Power-down should work without the device sending endless null char. See the capture below on my setup. Make sure RXD pin remains high during power down.</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="1.png" style="width: 999px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/266212i0C57BB24ED27BEA9/image-size/large?v=v2&amp;px=999" role="button" title="1.png" alt="1.png" /></span></P> <P>Are you using the latest device version? What is the date code on these devices?</P> <P>BR, Tomas</P> Mon, 04 Mar 2024 07:35:13 GMT https://community.nxp.com/t5/Other-NXP-Products/SC18IM704-sleep-mode/m-p/1820263#M21475 TomasVaverka 2024-03-04T07:35:13Z https://community.nxp.com/t5/Other-NXP-Products/SC18IM704-sleep-mode/m-p/1820430#M21477 <P>Hi Tomas, thanks a lot for your fast reply. You're right, datasheet is very clear about this.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Tix00_0-1709545511145.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/266260i05FDB98996024111/image-size/medium?v=v2&amp;px=400" role="button" title="Tix00_0-1709545511145.png" alt="Tix00_0-1709545511145.png" /></span></P><P>BW, Tix00</P> Mon, 04 Mar 2024 09:47:06 GMT https://community.nxp.com/t5/Other-NXP-Products/SC18IM704-sleep-mode/m-p/1820430#M21477 Tix00 2024-03-04T09:47:06Z