topic LPC54101 RAM and Flash Speed in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/LPC54101-RAM-and-Flash-Speed/m-p/600817#M23326 <HTML><HEAD></HEAD><BODY><P>A few questions:</P><OL><LI>The data sheet mentions "flash accelerator" but gives no further information. How does this work?</LI><LI>Is the RAM zero wait state?</LI><LI>Somewhere I think I read that program executing out of RAM has 1 wait state, is this correct?</LI><LI>I assume the part has no cache?</LI></OL><P>Regards &nbsp; --- &nbsp; Roger</P></BODY></HTML> Wed, 26 Oct 2016 10:14:15 GMT rogerlittlewood 2016-10-26T10:14:15Z LPC54101 RAM and Flash Speed https://community.nxp.com/t5/LPC-Microcontrollers/LPC54101-RAM-and-Flash-Speed/m-p/600817#M23326 <HTML><HEAD></HEAD><BODY><P>A few questions:</P><OL><LI>The data sheet mentions "flash accelerator" but gives no further information. How does this work?</LI><LI>Is the RAM zero wait state?</LI><LI>Somewhere I think I read that program executing out of RAM has 1 wait state, is this correct?</LI><LI>I assume the part has no cache?</LI></OL><P>Regards &nbsp; --- &nbsp; Roger</P></BODY></HTML> Wed, 26 Oct 2016 10:14:15 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC54101-RAM-and-Flash-Speed/m-p/600817#M23326 rogerlittlewood 2016-10-26T10:14:15Z Re: LPC54101 RAM and Flash Speed https://community.nxp.com/t5/LPC-Microcontrollers/LPC54101-RAM-and-Flash-Speed/m-p/600818#M23327 <HTML><HEAD></HEAD><BODY><P>On Flash accelerator, there is a bit of information about this in User Manual -4.5.33 Flash Configuration register. The basic concept come from Flash being speed limited at around 3xMHz (depending on wafer process &amp; design), semiconductor suppliers use different techniques to speed things up... namely : Buffers for fetching (Instruction vs Data ), Pre-fetching (for more than 1 buffer), Wait State insertion. There is a trade-off between power &amp; speed. Note :this is NOT Cache or Tightly Coupled Memory (TCM)... this part (most LPC) has no Cache.&nbsp;</P><P></P><P>As for SRAM in LPC5410x, it is always zero wait state (up to 100MHz).&nbsp;</P><P></P><P>Hope this is clear.</P></BODY></HTML> Thu, 27 Oct 2016 21:22:37 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC54101-RAM-and-Flash-Speed/m-p/600818#M23327 ckphua 2016-10-27T21:22:37Z