LPC Microcontrollersのトピック[LPC1788] [LPCOpen] Bug in EMC initialisation with SDRAM in RBC configuration https://community.nxp.com/t5/LPC-Microcontrollers/LPC1788-LPCOpen-Bug-in-EMC-initialisation-with-SDRAM-in-RBC/m-p/573446#M18812 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by pgr on Tue Jun 24 01:45:49 MST 2014</STRONG><BR /><SPAN>Hi all,</SPAN><BR /><BR /><SPAN>I am using LPCOpen last revision with on a LPC1788 with external SDRAM configured as RBC (Row Bank Column).</SPAN><BR /><BR /><SPAN>I have found that there is a bug when configuring SDRAM mode register, according to the LPC1788 user manual: </SPAN><BR /><BR /><HR /><SPAN style="color: #0000ff;"><STRONG>Quote: </STRONG><BR />Determine the shift value OFFSET to shift the mode register content by. This shift<BR />value depends on the SDRAM device organization and it is calculated as:<BR />OFFSET = number of columns + total bus width + bank select bits (RBC mode)<BR />OFFSET = number of columns + total bus width (BRC mode)</SPAN><HR /><BR /><BR /><SPAN>The bank select bits are never added to the Col_len variable in initDynMem() function so the mode register is wrongly initialized.</SPAN><BR /><BR /><SPAN>PGR</SPAN></BODY></HTML> Wed, 15 Jun 2016 20:15:03 GMT lpcware 2016-06-15T20:15:03Z [LPC1788] [LPCOpen] Bug in EMC initialisation with SDRAM in RBC configuration https://community.nxp.com/t5/LPC-Microcontrollers/LPC1788-LPCOpen-Bug-in-EMC-initialisation-with-SDRAM-in-RBC/m-p/573446#M18812 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by pgr on Tue Jun 24 01:45:49 MST 2014</STRONG><BR /><SPAN>Hi all,</SPAN><BR /><BR /><SPAN>I am using LPCOpen last revision with on a LPC1788 with external SDRAM configured as RBC (Row Bank Column).</SPAN><BR /><BR /><SPAN>I have found that there is a bug when configuring SDRAM mode register, according to the LPC1788 user manual: </SPAN><BR /><BR /><HR /><SPAN style="color: #0000ff;"><STRONG>Quote: </STRONG><BR />Determine the shift value OFFSET to shift the mode register content by. This shift<BR />value depends on the SDRAM device organization and it is calculated as:<BR />OFFSET = number of columns + total bus width + bank select bits (RBC mode)<BR />OFFSET = number of columns + total bus width (BRC mode)</SPAN><HR /><BR /><BR /><SPAN>The bank select bits are never added to the Col_len variable in initDynMem() function so the mode register is wrongly initialized.</SPAN><BR /><BR /><SPAN>PGR</SPAN></BODY></HTML> Wed, 15 Jun 2016 20:15:03 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC1788-LPCOpen-Bug-in-EMC-initialisation-with-SDRAM-in-RBC/m-p/573446#M18812 lpcware 2016-06-15T20:15:03Z