beautypg.com
4
www.kontron.com
User’s Guide
4.2
JTAG ...................................................................................................................................... 64
4.2.1
Connector J2 CPU JTAG ...................................................................................................... 64
4.2.2
Connector J1 – CPLD JTAG .................................................................................................. 65
5
ULP-COM sA3874i Special Features ........................................................................... 67
5.1
Watchdog Timer ....................................................................................................................... 67
5.2
PMU GPIO ............................................................................................................................... 67
5.3
ULP-COM sA3874i I/O ............................................................................................................... 68
5.4
Temperature Sensor .................................................................................................................. 71
5.5
ULP-COM sA3874i Power Management .......................................................................................... 71
5.6
Board ID EEPROM ..................................................................................................................... 71
6
Thermal Design Considerations ................................................................................ 72
6.1
Thermal Management ................................................................................................................ 72
6.2
Heat Spreader Dimensions ......................................................................................................... 72
6.3
Thermal Parameters .................................................................................................................. 73
6.4
Operation without a Heat Spreader / Heat Sink ............................................................................. 73
7
ULP-COM sA3874i Software ..................................................................................... 74
7.1
Introduction ........................................................................................................................... 74
7.2
Linux EZ Software Development Kit ............................................................................................. 74
7.3
ULP-COM sA3874i Linux Modifications ......................................................................................... 74
7.4
Kontron BSP (Board Support Package) ......................................................................................... 74
8
ULP-COM sA3874i Boot Brief ................................................................................... 75
8.1
ULP-COM sA3874i Boot Up Sequence ........................................................................................... 75
8.2
BOOT Selection ........................................................................................................................ 76
9
ULP-COM sA3874i Programming Methods ................................................................... 77
9.1
External SD Card Programming .................................................................................................... 77
9.2
SPI Programming ..................................................................................................................... 77
9.3
eMMC Programming .................................................................................................................. 77
10
Appendix A: Major Components BOM ......................................................................... 78
11
Appendix B: Document Revision History .................................................................... 81
