https://community.nxp.com/t5/K32-L-Series-Microcontrollers/K32L2A-USB-RAM/m-p/1190489#M21 <P>Hi,</P><P>On fig.1 with block diagram from K32L2A datasheet is USB RAM with dedicated connection (black line over mux) to USB module.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="k32l2a.gif" style="width: 570px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/131271i3F336C045BDDCD82/image-size/large?v=v2&amp;px=999" role="button" title="k32l2a.gif" alt="k32l2a.gif" /></span></P><P>Let say that BDT with EP buffer's are placed in USB RAM. In moment of receiving 64 bytes EP packet (K32L2A as USB device) from master (PC) <STRONG>all</STRONG> USB module data access will go over that dedicated connection (black line), or USB module will request access also to (non-USB) RAM. If core executing program from (non-USB) RAM that processing some data stored inside (non-USB) RAM, USB module will steal some cycles (due to non-USB RAM access) or not?</P><P>Regards,</P><P>Josip</P> Sat, 28 Nov 2020 07:45:10 GMT jh0 2020-11-28T07:45:10Z https://community.nxp.com/t5/K32-L-Series-Microcontrollers/K32L2A-USB-RAM/m-p/1190489#M21 <P>Hi,</P><P>On fig.1 with block diagram from K32L2A datasheet is USB RAM with dedicated connection (black line over mux) to USB module.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="k32l2a.gif" style="width: 570px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/131271i3F336C045BDDCD82/image-size/large?v=v2&amp;px=999" role="button" title="k32l2a.gif" alt="k32l2a.gif" /></span></P><P>Let say that BDT with EP buffer's are placed in USB RAM. In moment of receiving 64 bytes EP packet (K32L2A as USB device) from master (PC) <STRONG>all</STRONG> USB module data access will go over that dedicated connection (black line), or USB module will request access also to (non-USB) RAM. If core executing program from (non-USB) RAM that processing some data stored inside (non-USB) RAM, USB module will steal some cycles (due to non-USB RAM access) or not?</P><P>Regards,</P><P>Josip</P> Sat, 28 Nov 2020 07:45:10 GMT https://community.nxp.com/t5/K32-L-Series-Microcontrollers/K32L2A-USB-RAM/m-p/1190489#M21 jh0 2020-11-28T07:45:10Z