i.MX Processors中的主题 iMX286 custom board: need some hints. https://community.nxp.com/t5/i-MX-Processors/iMX286-custom-board-need-some-hints/m-p/196436#M10464 <HTML><HEAD></HEAD><BODY><P>I've just beginning to design a iMX286 custom board taking as reference the EVK schematics and layout. I hope someone with previous experience in this matter can give some hints about:<BR /> <BR /> 1. I will use: 2xUSB, 1xETH, 2xCAN, 24bit LCD and 8xGPIO. With this amount of nets and using 4 layer, 4mil track/space and 8mil/16mil vias I can do the fanout without problems. However I still concerned about the convenience or not to use 6L and so to fill a layer only with power planes. Have any of you manufactured a 4L board without EMC problems?<BR /> <BR /> 2. I can see DDR EMI_A13 and EMI_A14 nets connected in the EVK schematics. Why? The memory has 1Gb not 4Gb... Besides I can see those pins as NC&nbsp; on the EDE1116AEBG datasheet.<BR /> <BR /> 3.&nbsp; How do I place the DDR decoupling capacitors?. There are 16 power pins (VDD, VDDQ and VDDL) and I can see 13 capacitors with different values (0.01, 0.1, 0.22 and 10uF). I really don't know how to link them.<BR /> <BR /> Thanks!</P></BODY></HTML> Sun, 18 Dec 2011 12:51:38 GMT ManuMartinez 2011-12-18T12:51:38Z iMX286 custom board: need some hints. https://community.nxp.com/t5/i-MX-Processors/iMX286-custom-board-need-some-hints/m-p/196436#M10464 <HTML><HEAD></HEAD><BODY><P>I've just beginning to design a iMX286 custom board taking as reference the EVK schematics and layout. I hope someone with previous experience in this matter can give some hints about:<BR /> <BR /> 1. I will use: 2xUSB, 1xETH, 2xCAN, 24bit LCD and 8xGPIO. With this amount of nets and using 4 layer, 4mil track/space and 8mil/16mil vias I can do the fanout without problems. However I still concerned about the convenience or not to use 6L and so to fill a layer only with power planes. Have any of you manufactured a 4L board without EMC problems?<BR /> <BR /> 2. I can see DDR EMI_A13 and EMI_A14 nets connected in the EVK schematics. Why? The memory has 1Gb not 4Gb... Besides I can see those pins as NC&nbsp; on the EDE1116AEBG datasheet.<BR /> <BR /> 3.&nbsp; How do I place the DDR decoupling capacitors?. There are 16 power pins (VDD, VDDQ and VDDL) and I can see 13 capacitors with different values (0.01, 0.1, 0.22 and 10uF). I really don't know how to link them.<BR /> <BR /> Thanks!</P></BODY></HTML> Sun, 18 Dec 2011 12:51:38 GMT https://community.nxp.com/t5/i-MX-Processors/iMX286-custom-board-need-some-hints/m-p/196436#M10464 ManuMartinez 2011-12-18T12:51:38Z