HI3520DV400+NVP6134C方案，调试没问题，就是3.3V上纹波太大，请问有相同情况吗

[img]http://m.qpic.cn/psc?/V10GYNyv1cGl8U/U7GTO5SC0gbMQlEFE2qGgaXSogWFM3PwQVStpQKdWg*3GjH6oWlSKCqFaf0.bw*zLkUBxfk0dIrzOiyNDnweterAYxliKjRQ.wJDjOLFhhk!/anull&bo=cAO4AgAAAAADB.s!&rf=photolist&t=5[/img]

[img]http://m.qpic.cn/psc?/V10GYNyv1cGl8U/U7GTO5SC0gbMQlEFE2qGgaXSogWFM3PwQVStpQKdWg*3GjH6oWlSKCqFaf0.bw*zLkUBxfk0dIrzOiyNDnweterAYxliKjRQ.wJDjOLFhhk!/b&bo=cAO4AgAAAAADB.s!&rf=viewer_4[/img]

电源问题，可大可小，可深可浅，不好说啊！

电源设计的问题，需要检讨电源的设计电路

测量方法对不对？有没有用弹簧？3V3是LDO出来的还是DCDC出来的？

.......图片如下

  Operating voltages
− 0.9 V core voltage
− 1.0 V CPU voltage
− 3.3 V I/O voltage
− 1.5 V DDR3 SDRAM interface voltage
  Package
− RoHS, TFBGA
− Lead pitch of 0.65 mm (0.03 in.)
− Body size of 15 mm x 15 mm (0.59 in. x 0.59 in.)
  Operating temperature ranging from 0°C (32°F) to 70°C
(158°F)
− −
− −
− −
1-/2-/4-wire SPI NOR/NAND flash
Two CSs, connected to different types of flash memories
Maximum capacity of 64 MB for each CS (for the SPI NOR flash)
Maximum capacity of 512 MB for each CS (for the SPI NAND flash)
2 KB/4 KB page size (for the SPI NAND flash)
8-bit/1 KB or 24-bit/1 KB ECC (for the SPI NAND flash)
  Embedded 4 KB BOOTROM and 16 KB SRAM RTC with an Independent Power Supply