ADLINK Express-HLE - Manual (Page 22)

Page 22 Express-HLE
3.3.11 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
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 3.3V Carrier shall pull to GND
or leave no- connect.
BIOS_DIS1# B88 Selection strap to determine the BIOS boot device. I PU 10K 3.3V Carrier shall pull to GND
or leave no- connect
3.3.12 Miscellaneous
Signal Pin # Description I/O PU/PD Comment
SPKR B32 Output for audio enunciator, the “speaker” in PC-AT
systems O 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 PU 330 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
FAN_TACHIN11 B102 Fan tachometer input for a fan with a two pulse output. I OD 3.3V PU 10k 3.3V
TPM_PP11 C83 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 10k 3.3V
PD is only placed
when TPM is
installed on module
3.3.13 SMBus
Signal Pin # Description I/O PU/PD Comment
SMB_CK B13 System Management Bus bidirectional clock line. Power
sourced through 5V standby rail and main power rails. I/O OD 3.3VSB PU 2k2 3.3VSB
SMB_DAT# B14 System Management Bus bidirectional data line. Power
sourced through 5V standby rail and main power rails. I/O OD 3.3VSB PU 2k2 3.3VSB
SMB_ALERT# B15 System Management Bus Alert – active low input can
be used to generate an SMI# (System Management
Interrupt) or to wake the system. Power sourced
through 5V standby rail and main power rails. I 3.3VSB PU 10k 3.3VSB