Kontron mITX-BDW-U, User Manual

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mITX-BDW-U – User Guide, Rev. 1.6
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7.13. “Load Default BIOS Settings” Jumper (JP1)
The “Load Default BIOS Settings” of jumper (JP1) can be used to recover from incorrect BIOS settings. As an example,
an incorrect BIOS setting that causes the attached display not to turn on can be erased by this Jumper.
The Jumper has 6 positions: Pin 5-6 are used for the Load Default BIOS function.
7.14. Always On Jumper Setting (JP1)
The “Always On Setting” of jumper (JP1) can be used to automatically power up, when the external power supply is
switched ON.
The Jumper has 6 positions: Pin 1-2 are used for the “ Always On” function.
When the jumper is in not mounted, then the Always On feature is disabled and it might be necessary to activate the
power on button (PWRBTN_IN#) at the front panel connector (FRONTPNL) in order to switch on the board.
7.15. SPI Connector (J30)
The SPI Connector (J30) is normally not used. If however a SPI BIOS is connected via the SPI Connector, then the board
attempts to boot from it.
SPI Connector Pinout
Note Pull
U/D Ioh/Iol Type Signal PIN Signal Type Ioh/Iol Pull
U/D Note
CLK 1 2 SB3V3 PWR
I CS0# 3 4 ADDIN IO /10K
10K/ NC 5 6 NC
10K/ IO MOSI 7 8 ISOLATE# IO 100K
IO MISO 9 10 GND PWR
1K IO SPI_IO2_
#WP 11 12 SPI_IO3_#
HOLD IO 1K
Signal Description
CLK Serial Clock
SB3V3 3.3 V Standby Voltage power line. Normally output power, but when Motherboard is turned off
then the on-board SPI Flash can be 3.3 V power sourced via this pin.
CS0# CS0# Chip Select 0, active low.
ADDIN ADDIN input signal must be NC.
MOSI Master Output, Slave Input.
ISOLATE# The ISOLATE# input, active low, is normally NC, but must be connected to GND when
programming the SPI flash. Power Supply to the Motherboard must be turned off when loading
SPI flash. The pull up resistor is connected via diode to 5 VSB.
MISO Master Input, Slave Output
SPI_IO2_#WP SPI Data I/O: A bidirectional signal used to support Dual IO Fast Read, Quad IO Fast Read and
Quad Output Fast Read modes. The signal is not used in Dual Output Fast Read mode.
SPI_IO3_#HOLD SPI Data I/O: A bidirectional signal used to support Dual IO Fast Read, Quad IO Fast Read and
Quad Output Fast Read modes. The signal is not used in Dual Output Fast Read mode.