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KTD-N0904-E
"Always On" (Always On)
7.11
The "Always On" can be used to implement hardware controlled Always ON by jumper. When "Always On" is
selected, then the board will power up automatically when power is connected. It doesn't matter if "Always
On" is not selected in BIOS.
The board can still be shut down by PWRBTN_IN# (power button in) activation (via Front Panel connector).
Always On
pin1-2
pin2-3
X
-
-
X
-
-
SPI Connector (SPI)
7.12
The SPI (Serial Peripheral Interface) Bus connector provides synchronous full duplex in a 9 pin header.
Header
Signal
Description
SPI_CLK
Serial Clock
3.3V Standby Voltage power line. Normally output power, but when Motherboard is
3.3V
turned off then the on-board SPI Flash can be 3.3V power sourced via this pin.
SPI_CS#
CS# Chip Select, active low.
ADDIN
ADDIN input signal must be NC.
SPI_MOSI
Master Output, Slave Input.
The ISOLATE# input, active low, is normally NC, but must be connected to GND when
ISOLATE#
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.
SPI_MISO
Master Input, Slave Output
SPI Data I/O: A bidirectional signal used to support Dual IO Fast Read, Quad IO Fast Read
SPI_IO2_#WP
and Quad Output Fast Read modes. The signal is not used in Dual Output Fast Read mode.
SPI Data I/O: A bidirectional signal used to support Dual IO Fast Read, Quad IO Fast Read
SPI_IO3_#HOLD
and Quad Output Fast Read modes. The signal is not used in Dual Output Fast Read mode.
Page 30
Description
Always On selection
Default position
No function. Note: may load default BIOS settings after several minutes
Pin
Signal
1
GND
2
SPI_MISO
SPI master input, Slave Output
3
SPI_MOSI
SPI master output, Slave Input
4
SPI_CS#
SPI slave select, active low
5
SPI_CLK
6
NC
7
3.3V
8
ADDIN
9
ISOLATE#
pITX-E38 Users Guide
Description
Ground
SPI clock
Not connected
3.3V Power
Disable onboard SPI flash
Disable the SPI interface
IO-Area Connectors
Type
PWR
IO-3.3
IO-3.3
O-3.3
O-3.3
NC
PWR
I-3.3
I-3.3
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