nanoX-AL
Pinouts and Signal Descriptions
21
3.3.12. SPI (BIOS only)
Signal
Pin
Description
I/O
PU/PD
Comment
SPI_CS#
B97
Chip select for Carrier Board SPI BIOS Flash.
O 3.3VSB PU 10k
3.3VSB
SPI_MISO
A92
Data in to module from carrier board SPI BIOS flash.
I 3.3VSB
SPI_MOSI
A95
Data out from module to carrier board SPI BIOS flash.
O 3.3VSB
SPI_CLK
A94
Clock from module to carrier board SPI BIOS flash.
O 3.3VSB
SPI_POWER A91 Power supply for Carrier Board SPI – sourced from Module
– nominally 3.3V.
The Module shall provide a minimum of 100mA on
SPI_POWER.
Carriers shall use less than 100mA of SPI_POWER.
SPI_POWER shall only be used to power SPI devices on
the Carrier
O P
3.3VSB
BIOS_DIS0# A34
Selection strap to determine the BIOS boot device.
I
PU 10k
3.3VSB
Carrier shall
pull to GND or
leave not
connected
BIOS_DIS1# B88
Selection strap to determine the BIOS boot device.
I
PU 10k
3.3VSB
Carrier shall
pull to GND or
leave not
connected
3.3.13. Miscellaneous
Signal
Pin
Description
I/O
PU/PD
Comment
SPKR B32
Output for audio enunciator, the “speaker” in PC-AT
systems
O 3.3V
PU 10k
3.3V
WDT B27
Output indicating that a watchdog time-out event has
occurred.
O 3.3V
THRM# B35
Input from off-module temp sensor indicating an over-
temp situation.
I 3.3V
THERMTRIP# A35
Active low output indicating that the CPU has entered
thermal shutdown.
O 3.3V
FAN_PWMOUT
B101 Fan speed control. Uses the Pulse Width Modulation
(PWM) technique to control the fan’s RPM.
O OD
3.3V
PU 2.2k
3.3V
There shall
be PD on
carrier
board
FAN_TACHIN11 B102 Fan tachometer input for a fan with a two pulse output.
I OD
3.3V
PU 10k
3.3V
TPM_PP11
A96 Trusted Platform Module (TPM) Physical Presence pin.
Active high. TPM chip has an internal pull down. This
signal is used to indicate Physical Presence to the TPM.
I 3.3V
PD 100k
PD only
when TPM
on module
(TBD)
Summary of Contents for nanoX-AL
Page 10: ...2 Introduction This page intentionally left blank...
Page 18: ...10 Specifications This page intentionally left blank...
Page 42: ...34 Smart Embedded Management Agent SEMA This page intentionally left blank...
Page 80: ...72 BIOS Setup This page intentionally left blank...
Page 90: ...82 BIOS Checkpoints Beep Codes This page intentionally left blank...