PowerQUICC ProcessorsのトピックRe: MPC8280 SDRAM  60x Bus配置问题 https://community.nxp.com/t5/PowerQUICC-Processors/MPC8280-SDRAM-60x-Bus%E9%85%8D%E7%BD%AE%E9%97%AE%E9%A2%98/m-p/1005907#M3121 <HTML><HEAD></HEAD><BODY><P>我看在AN2165中有个描述写的是在MPC8260A中“the MPC8260A (HiP4) and revision C of the MPC8260&nbsp;can use these values but require an external multiplexer.”是否MPC8280CVVQLDA型号也是如此？</P></BODY></HTML> Mon, 11 Nov 2019 09:24:31 GMT lhb_will 2019-11-11T09:24:31Z MPC8280 SDRAM 60x Bus配置问题 https://community.nxp.com/t5/PowerQUICC-Processors/MPC8280-SDRAM-60x-Bus%E9%85%8D%E7%BD%AE%E9%97%AE%E9%A2%98/m-p/1005905#M3119 <HTML><HEAD></HEAD><BODY><P>在外面集成了两块SDRAM，型号是MT48LC4M32B2-。但是按照如下命令进行写时发现0x8地址的写入会修改0、0x10、0x1C地址的数据。请问可能是哪里没配置好？</P><SPAN> </SPAN><P><span class="lia-inline-image-display-wrapper"><img src="https://community.nxp.com/t5/image/serverpage/image-id/92193iCB1EF6B9D79E325D/image-size/large?v=v2&amp;px=999" title="sdram.jpg" alt="sdram.jpg" /></span></P></BODY></HTML> Tue, 05 Nov 2019 10:27:22 GMT https://community.nxp.com/t5/PowerQUICC-Processors/MPC8280-SDRAM-60x-Bus%E9%85%8D%E7%BD%AE%E9%97%AE%E9%A2%98/m-p/1005905#M3119 lhb_will 2019-11-05T10:27:22Z Re: MPC8280 SDRAM 60x Bus配置问题 https://community.nxp.com/t5/PowerQUICC-Processors/MPC8280-SDRAM-60x-Bus%E9%85%8D%E7%BD%AE%E9%97%AE%E9%A2%98/m-p/1005906#M3120 <HTML><HEAD></HEAD><BODY><P>SDRAM memory chips require initialization sequence after power-on. Please look MPC8280 Reference Manual, Section&nbsp;11.4.2 "SDRAM Power-On Initialization" for the exact sequence.</P><P></P><P><A href="https://www.nxp.com/docs/en/reference-manual/MPC8280RM.pdf">https://www.nxp.com/docs/en/reference-manual/MPC8280RM.pdf</A></P></BODY></HTML> Sun, 10 Nov 2019 19:28:14 GMT https://community.nxp.com/t5/PowerQUICC-Processors/MPC8280-SDRAM-60x-Bus%E9%85%8D%E7%BD%AE%E9%97%AE%E9%A2%98/m-p/1005906#M3120 alexander_yakov 2019-11-10T19:28:14Z Re: MPC8280 SDRAM  60x Bus配置问题 https://community.nxp.com/t5/PowerQUICC-Processors/MPC8280-SDRAM-60x-Bus%E9%85%8D%E7%BD%AE%E9%97%AE%E9%A2%98/m-p/1005907#M3121 <HTML><HEAD></HEAD><BODY><P>我看在AN2165中有个描述写的是在MPC8260A中“the MPC8260A (HiP4) and revision C of the MPC8260&nbsp;can use these values but require an external multiplexer.”是否MPC8280CVVQLDA型号也是如此？</P></BODY></HTML> Mon, 11 Nov 2019 09:24:31 GMT https://community.nxp.com/t5/PowerQUICC-Processors/MPC8280-SDRAM-60x-Bus%E9%85%8D%E7%BD%AE%E9%97%AE%E9%A2%98/m-p/1005907#M3121 lhb_will 2019-11-11T09:24:31Z Re: MPC8280 SDRAM 60x Bus配置问题 https://community.nxp.com/t5/PowerQUICC-Processors/MPC8280-SDRAM-60x-Bus%E9%85%8D%E7%BD%AE%E9%97%AE%E9%A2%98/m-p/1005908#M3122 <HTML><HEAD></HEAD><BODY><P>Yes</P></BODY></HTML> Mon, 11 Nov 2019 19:50:57 GMT https://community.nxp.com/t5/PowerQUICC-Processors/MPC8280-SDRAM-60x-Bus%E9%85%8D%E7%BD%AE%E9%97%AE%E9%A2%98/m-p/1005908#M3122 alexander_yakov 2019-11-11T19:50:57Z Re: MPC8280 SDRAM  60x Bus配置问题 https://community.nxp.com/t5/PowerQUICC-Processors/MPC8280-SDRAM-60x-Bus%E9%85%8D%E7%BD%AE%E9%97%AE%E9%A2%98/m-p/1005909#M3123 <HTML><HEAD></HEAD><BODY><P>如果我使用两块MT48LC4M32B2组成64bit数据，连接到60x BUS上的CS1片选上。B60x_ADD28连接到SDRAM的A0，B60x_ADD27连接到SDRAM的A1...B60x_ADD16连接到SDRAM的A12，其中SDA10连接到SDRAM的A10，BNKSEL连接到SDRAM的BA。PSDMR配置为0xc24b36a3，OR1配置为0xfe002ec0，BR1配置为0xf0000041，SIUMCR配置为0x0e200000。这样是否正确。下面是我的SDRAM初始化序列。</P><P>writemmr OR1 0xfe002ec0<BR />writemmr BR1 0x00000041</P><P>writemmr PSRT 0x13</P><P>writemmr MPTPR 0x2800</P><P># precharge all banks<BR />writemmr PSDMR 0x824b36a3<BR />writemmr PSDMR 0xaa4b36a3</P><P># perform an access<BR />writemem.b 0x00000000 0x00</P><P># cbr refresh<BR />writemmr PSDMR 0x8a4b36a3</P><P># perform 8 accesses<BR />writemem.b 0x00000000 0xFF<BR />writemem.b 0x00000000 0xFF<BR />writemem.b 0x00000000 0xFF<BR />writemem.b 0x00000000 0xFF<BR />writemem.b 0x00000000 0xFF<BR />writemem.b 0x00000000 0xFF<BR />writemem.b 0x00000000 0xFF<BR />writemem.b 0x00000000 0xFF</P><P>; Issue Mode register write<BR />writemmr PSDMR 0x9a4b36a3</P><P>writemem.b 0x00000190 0x00</P><P>writemmr PSDMR 0xc24b36a3</P></BODY></HTML> Tue, 12 Nov 2019 06:22:12 GMT https://community.nxp.com/t5/PowerQUICC-Processors/MPC8280-SDRAM-60x-Bus%E9%85%8D%E7%BD%AE%E9%97%AE%E9%A2%98/m-p/1005909#M3123 lhb_will 2019-11-12T06:22:12Z