Smart Mobility ARChitecture Design Guide SMARC Design Guide 2.0 March 23, 2017 © Copyright 2017, SGeT Standardization Group for Embedded Technology e.V. Note that some content of this SGeT document may be legally protected by patent rights not held by SGeT. SGeT is not obligated to identify the parts of this specification that require licensing or other legitimization. The contents of this SGeT document are advisory only. Users of SGeT documents are responsible for protecting themselves against liability for infringement of patents. All content and information within this document are subject to change without prior notice. SGeT provides no warranty with regard to this SGeT document or any other information contained herein and hereby expressly disclaims any implied warranties of merchantability or fitness for any particular purpose with regard to any of the foregoing. SGeT assumes no liability for any damages incurred directly or indirectly from any technical or typographical errors or omissions contained herein or for discrepancies between the product and this SGeT document. In no event shall SGeT be liable for any incidental, consequential, special, or exemplary damages, whether based on tort, contract or otherwise, arising out of or in connection with this SGeT document or any other information contained herein or the use thereof. SMARC Design Guide 2.0 Page 2 of 119 Mar 23, 2017 ©SGeT e.V. REVISION HISTORY Revision Comments Originator Date 1.0 Initial Release S. Milnor / Kontron July 1, 2013 1.1 Created sharper images for Fig 19, 60, 69 S. Milnor / Kontron July 5, 2013 Fixed small typos and grammar mistakes 2.0 Update to SMARC 2.0 Hardware B. Mayer / Technagon March 23, 2017 Specification SMARC Design Guide 2.0 Page 3 of 119 Mar 23, 2017 ©SGeT e.V. CONTENTS 1 Introduction .......................................................................................................................................... 10 1.1 General Introduction .................................................................................................................... 10 1.2 Purpose of This Document .......................................................................................................... 10 1.3 Design Help ................................................................................................................................. 10 1.4 Abbreviations and Acronyms Used ............................................................................................. 11 1.5 Document References ................................................................................................................ 13 1.5.1 SGET Documents ............................................................................................................... 13 1.5.2 Industry Standards Documents ........................................................................................... 13 1.6 Schematic Example Correctness ................................................................................................ 15 1.7 Software Support ........................................................................................................................ 15 1.8 Schematic Example Conventions ............................................................................................... 16 2 Infrastructure: Connector, Power Delivery, System Management ...................................................... 18 2.1 Module Connector ....................................................................................................................... 18 2.2 Module Power ............................................................................................................................. 21 2.2.1 Input Voltage Range ........................................................................................................... 21 2.2.2 Input Voltage Rise Time ...................................................................................................... 21 2.2.3 Module Maximum Input Power ............................................................................................ 21 2.2.4 Power Path .......................................................................................................................... 21 2.3 Module I/O Voltage ..................................................................................................................... 23 2.4 VIN_PWR_BAD# ........................................................................................................................ 24 2.5 CARRIER_PWR_ON .................................................................................................................. 24 2.6 Reset In to Module ...................................................................................................................... 24 2.7 Power Button ............................................................................................................................... 25 2.8 Force Recovery ........................................................................................................................... 26 2.9 Power Up Sequence ................................................................................................................... 27 2.9.1 CARRIER_STBY# ............................................................................................................... 28 2.10 Boot Selection ............................................................................................................................. 29 2.10.1 Boot Definitions ................................................................................................................... 29 2.10.2 SMARC BOOT_SEL Pins ................................................................................................... 30 2.11 RTC Backup Power ..................................................................................................................... 31 2.12 Reserved / Test Interfaces .......................................................................................................... 32 3 Display Interfaces ................................................................................................................................ 33 3.1 Module LVDS .............................................................................................................................. 33 3.1.1 NEC 1280 x 768 Single Channel LVDS Example ............................................................... 33 3.1.2 LVDS Dual Channel example ............................................................................................. 35 3.1.3 Display Parameters and EDID ............................................................................................ 37 3.2 HDMI ........................................................................................................................................... 38 3.3 DisplayPort (DP++) ..................................................................................................................... 39 3.3.1 HDMI over DP++ ................................................................................................................. 39 3.4 Embedded DisplayPort (eDP) ..................................................................................................... 40 3.5 MIPI DSI ...................................................................................................................................... 41 4 Low / Medium Speed Serial I/O Interfaces ......................................................................................... 42 4.1 Asynchronous Serial Ports .......................................................................................................... 42 4.1.1 RS232 Ports ........................................................................................................................ 42 4.1.2 RS485 Half-Duplex.............................................................................................................. 43 4.2 I2C Interfaces .............................................................................................................................. 45 4.2.1 General ................................................................................................................................ 45 4.2.2 I2C Level Translation, Isolation and Buffering .................................................................... 45 4.2.3 I2C_PM Bus EEPROMs ...................................................................................................... 47 4.2.4 General I2C Bus EEPROMs ............................................................................................... 49 4.2.5 I2C Based I/O Expanders ................................................................................................... 50 4.2.6 Other I2C Devices ............................................................................................................... 51 4.3 Touch Screen Controller Interfaces ............................................................................................ 53 4.3.1 General ................................................................................................................................ 53 4.3.2 Interface Types / Driver Considerations .............................................................................. 53 SMARC Design Guide 2.0 Page 4 of 119 Mar 23, 2017 ©SGeT e.V. 4.3.3 Touch Controller Modules / ICs / Screens .........................................................................