LPC MicrocontrollersのトピックRe: Real-world SPIFI *write* performance? https://community.nxp.com/t5/LPC-Microcontrollers/Real-world-SPIFI-write-performance/m-p/669178#M26771 <HTML><HEAD></HEAD><BODY><P>Hi zzzmqp,</P><P></P><P>The write performance will be limited by the program and erase rates of the Flash part, in the case of the S25FL512S device the Programming rate is 1.5 Mbytes/s.</P><P></P><P>Hope it helps!</P><P></P><P>Best Regards,<BR />Carlos Mendoza<BR />Technical Support Engineer</P></BODY></HTML> Wed, 17 May 2017 00:04:35 GMT Carlos_Mendoza 2017-05-17T00:04:35Z Real-world SPIFI *write* performance? https://community.nxp.com/t5/LPC-Microcontrollers/Real-world-SPIFI-write-performance/m-p/669177#M26770 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>I have a LPC43xx running at full speed and get SGPIO data in at about 200Mbit/s (25MB/s). I need to store samples for a couple of seconds which requires at least 64 MB, if possible much more, amount of memory for storage.</P><P></P><P>Storing to internal RAM works fine, but it's only about 64-128 kB at most.</P><P></P><P>All interfaces that require a driver and file system are too slow (USB host, SD card).</P><P></P><P>External SDRAM (at 32bit EMC) comes close, but can't quite keep up.</P><P></P><P>So now I'm looking at SPIFI, especially the S25FL512S device. NXP marketing material indicates a 52MB/s bidirectional (read and write) interface to a SPIFI part. I've seen tests that confirm a 40-45 MB/s read performance... &nbsp;but what about writes...?</P><P></P><P>Will any external SPIFI part ever get me a ~25 MB/s write performance? If not, any other ideas how write 64+MB of data at 25 MB/s from a LPC43xx controller?</P></BODY></HTML> Sun, 07 May 2017 23:27:02 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Real-world-SPIFI-write-performance/m-p/669177#M26770 zzzmqp 2017-05-07T23:27:02Z Re: Real-world SPIFI *write* performance? https://community.nxp.com/t5/LPC-Microcontrollers/Real-world-SPIFI-write-performance/m-p/669178#M26771 <HTML><HEAD></HEAD><BODY><P>Hi zzzmqp,</P><P></P><P>The write performance will be limited by the program and erase rates of the Flash part, in the case of the S25FL512S device the Programming rate is 1.5 Mbytes/s.</P><P></P><P>Hope it helps!</P><P></P><P>Best Regards,<BR />Carlos Mendoza<BR />Technical Support Engineer</P></BODY></HTML> Wed, 17 May 2017 00:04:35 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Real-world-SPIFI-write-performance/m-p/669178#M26771 Carlos_Mendoza 2017-05-17T00:04:35Z Re: Real-world SPIFI *write* performance? https://community.nxp.com/t5/LPC-Microcontrollers/Real-world-SPIFI-write-performance/m-p/669179#M26772 <HTML><HEAD></HEAD><BODY><P>Thanks for confirming, Carlos, that does help.</P></BODY></HTML> Wed, 17 May 2017 17:02:14 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Real-world-SPIFI-write-performance/m-p/669179#M26772 zzzmqp 2017-05-17T17:02:14Z