mITX-APL
Doc. Rev. 1.2
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Table 29: Pin Assignment
Pin
Signal
Type
1
CLK
2
SB3V3
PWR
3
CS0#
I
4
ADDIN
IO
5
3V3_SPI
6
NC
7
MOSI
IO
8
ISOLATE#
IO
9
MISO
IO
10
GND
PWR
Table 30: Signal description
Signal
Description
CLK
Serial Clock
SB3V3/3V3_SPI
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 5VSB.
MISO
Master Input, Slave Output
