Table Of Contents - Dave Embedded Systems AXEL ULTRA Hardware Manual

A x e l H a r d w a r e M a n u a l

Table of Contents

1 Preface.....................................................................................................................................7
1.1 About this manual.............................................................................................................7
1.2 Copyrights/Trademarks.....................................................................................................7
1.3 Standards..........................................................................................................................7
1.4 Disclaimers.......................................................................................................................7
1.5 Warranty............................................................................................................................7
1.6 Technical Support.............................................................................................................8
1.7 Related documents...........................................................................................................9
1.8 Conventions, Abbreviations, Acronyms............................................................................9
2 Introduction.............................................................................................................................11
2.1 Product Highlights...........................................................................................................13
2.2 Block Diagram.................................................................................................................14
2.3 Feature Summary...........................................................................................................15
3 Design overview.....................................................................................................................18
3.1 NXP/Freescale i.MX6 application processor..................................................................18
3.2 DDR3 memory bank.......................................................................................................19
3.3 NOR flash bank...............................................................................................................19
3.4 NAND flash bank............................................................................................................20
3.5 Memory Map...................................................................................................................20
3.6 Power supply unit...........................................................................................................20
3.7 CPU module connectors.................................................................................................20
4 Mechanical specifications......................................................................................................21
4.1 Board Layout...................................................................................................................21
4.2 Connectors......................................................................................................................23
5 Power, reset and control........................................................................................................24
5.1 Power Supply Unit (PSU) and recommended power-up sequence...............................24
5.1.1 Note on NVCC_AXEL_I/O_3.3V/1.8V (BOARD_PGOOD) usage..........................26
5.1.2 Note on NVCC_EIM_EXT.......................................................................................26
5.1.3 Power rails and related signals...............................................................................26
5.2 Reset scheme and control signals..................................................................................29
5.2.1 CPU_PORn.............................................................................................................29
5.2.2 Boot_Mode0/1.........................................................................................................30
5.3 Voltage monitor...............................................................................................................30
5.4 System boot....................................................................................................................30
5.4.1 Boot modes.............................................................................................................31
5.4.2 Default boot configuration.......................................................................................32
5.4.3 Boot sequence customization.................................................................................33
5.5 Clock scheme.................................................................................................................34
5.6 Recovery.........................................................................................................................34
5.6.1 JTAG Recovery.......................................................................................................34
5.6.2 USB Recovery.........................................................................................................34
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