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EC2x&EG2x-G Series PCB Design Guideline
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EC2x&EG2x-G Series PCB Design Guideline
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EC2x&EG2x-G Series PCB Design Guideline
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About the Document
Revision History
Version
Date
Author
Description
-
2020-10-16
Lim PENG
Creation of the document
1.0
2020-12-04
Lim PENG
Initial
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Contents
About the Document .................................................................................................................................. 3
Contents ...................................................................................................................................................... 4
Table Index .................................................................................................................................................. 6
Figure Index ................................................................................................................................................ 7
1 Introduction ......................................................................................................................................... 9
1.1. Applicable Modules .................................................................................................................... 9
1.2. Safety Information .................................................................................................................... 10
2 PCB Design Overview ...................................................................................................................... 11
2.1. Basic Check Items ................................................................................................................... 11
2.2. Design Priorities and Considerations for PCB Traces ............................................................. 13
2.2.1. Design Priorities ............................................................................................................ 13
2.2.2. Design Considerations .................................................................................................. 13
3 Interface Design ................................................................................................................................ 15
3.1. Power Supply ........................................................................................................................... 15
3.1.1. DC-DC Converter .......................................................................................................... 15
3.1.2. VBAT ............................................................................................................................. 16
3.2. PWRKEY & RESET_N ............................................................................................................ 18
3.3. USB Interface ........................................................................................................................... 19
3.3.1. USB 2.0 Signals ............................................................................................................ 19
3.3.2. USB 3.1 Signals ............................................................................................................ 20
3.3.3. USB_VBUS Signal ........................................................................................................ 22
3.4. Ethernet PHY ........................................................................................................................... 22
3.4.1. RGMII Interface ............................................................................................................. 22
3.4.2. Ethernet Components ................................................................................................... 24
3.5. Audio Interfaces ....................................................................................................................... 26
3.5.1. I2S and I2C Interfaces .................................................................................................. 26
3.5.2. PCM Interface ............................................................................................................... 27
3.5.3. Codec & Microphone & Speaker .................................................................................. 28
3.6. SD Card Interface .................................................................................................................... 29
3.7. PCIe and WLAN Interfaces ...................................................................................................... 31
3.8. (U)SIM Interface ....................................................................................................................... 33
3.9. ADC Interface ........................................................................................................................... 34
3.10. SPI Interface ............................................................................................................................ 34
3.11. USB_BOOT .............................................................................................................................. 35
3.12. Antenna Interfaces ................................................................................................................... 37
3.12.1. PCB Structures of Microstrip and Coplanar Waveguide .............................................. 37
3.12.1.1. PCB Structure of Microstrip Waveguide ............................................................ 37
3.12.1.2. PCB Structure of Coplanar Waveguide ............................................................. 37
3.12.2. Reference Design of RF Layout.................................................................................... 39
3.12.3. Recommended Component Placement ........................................................................ 40
