35
35
3.4.2 Key
SYS_nRST is a reset key.
ONOFF is a power key, press it in ON mode, it will trigger a interrupt, and long press this key to
power off it forced. Press this key in OFF mode, the internal power management status will switch
to ON mode.
2x GPIO preserved for users’ definition.
Note: SYS_nRST and ONOFF should be suspended when they are not needed, but please don’t
pull-up or pull-down.
3.4.3 Boot
There are 4 DIP switches S1 for booting mode selection.
Boot mode
DIP
Internal
fuses
Serial
downloader
EMMC
SD
QSPI
MODE3
OFF
OFF
OFF
OFF
OFF
MODE2
OFF
OFF
OFF
OFF
ON
MODE1
OFF
OFF
ON
ON
ON
MODE0
OFF
ON
OFF
ON
OFF
Internal fuses is used for booting medium selection by chipset internal fuse, which is not available
by default, and it’s not suggested to be used.
Serial downloader is generally used of firmware download by OTG, the development board takes
P14 USB TypeC convert cable to be connected to PC, and then install firmware for the board.
eMMC: system boots from eMMC by default.
Summary of Contents for SBC OKMX8MPQ-C
Page 14: ...14 14...
Page 34: ...34 34...
Page 48: ...48 48 3 4 20 USB3 0 Type C...
Page 54: ...54 54 Appendix 2 Connector connector model on SoM is AXK6F80337YG...
Page 55: ...55 55 The connector matched on carrier board is AXK5F80537YG...
Page 58: ...58 58...
Page 59: ...59 59...
