Spi Recover Jumper (J4); Spi Connector (Spi) (J5) - Kontron KTD-N0850-B User Manual

KTD-N0850-B
6.12

SPI Recover Jumper (J4)

The SPI Recover Jumper is used to select BIOS Recovery Flash instead of BIOS Default Flash.
Normally SPI Recovery Jumper is not installed and board boots on the BIOS Default Flash. Only in case
the Default BIOS gets corrupted (board do not boot) follow the procedure:
1. First try to use the Load Default BIOS Settings Jumper, see previous page. If problem remains
then continue.
2. Turn off power.
3. Install "SPI Recover Jumper"(J4).
4. Reboot.
5. Upgrade the BIOS.
6. When BIOS upgrade is completed then turn off power completely (inclusive Standby +5V).
7. Remove "SPI Recover Jumper".
8. Wait for 1 minute.
9. Turn on power. System will automatically reboot 4-5 times within 1 minute.
6.13

SPI Connector (SPI) (J5)

The SPI Connector is normally not used. If however a SPI BIOS is connected via the SPI Connector
then the board will try to boot on it.
Note Pull U/D Ioh/Iol Type Signal
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Signal Description
CLK Serial Clock
3.3V Standby Voltage power line. Normally output power, but when Motherboard is
SB3V3
turned off then the on-board SPI Flash can be 3.3V power sourced via this pin.
CS0# CS0# Chip Select 0, active low.
ADDIN ADDIN input signal must be NC.
MOSI Master Output, Slave Input
The ISOLATE# input, active low, is normally NC, but must be connected to GND when
ISOLATE# loading SPI flash. Power Supply to the Motherboard must be turned off when loading
SPI flash. The pull up resistor is connected via diode to 5VSB.
MISO Master Input, Slave Output
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PIN Signal
CLK 1 2 SB3V3
I CS0# 3 4 ADDIN
- NC 5 6
IO MOSI 7 8 ISOLATE#
IO MISO 9 10 GND
Internal Connectors
Type Ioh/Iol Pull U/D Note
PWR -
IO
NC - -
IO
PWR -
KTQM77/mITX Users Guide
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