KTQM77/mITX Users Guide
KTD-N0850-B Page 52
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 S5V).
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 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
-
-
Signal
Description
CLK
Serial Clock
SB3V3
3.3V Standby Voltage power line. Normally output power, but when Motherboard is
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
ISOLATE#
The ISOLATE# input, active low, is normally NC, but must be connected to GND when
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
Internal Connectors
