QuadMo747-x2000
QuadMo747-x2000 User Manual - Rev. First Edition: 1.0 - Last Edition: 2.0 - Author: S.B. - Reviewed by G.G. Copyright © 2014 SECO S.r.l.
42
NM10 Express Chipset
’
s System Management Bus controller.
SMB_ALERT#: SM Bus Alert line for System Management. Bidirectional signal, electrical level +3.3V_A with a 10k
Ω
pull-up resistor. It is managed by Intel
®
NM10
Express Chipset
’
s System Management Bus controller. Any device place on the SM Bus can drive this signal low to signal an event on the bus itself.
GP0_I2C_CLK: general purpose I2C Bus clock line. Bidirectional signal, electrical level +3.3V_S with a 2k2
Ω
pull-up resistor. This I2C signal is derived from Intel
®
NM10 Express Chipset
’
s General Purpose I/O pin GPIO6.
GP0_I2C_DAT: general purpose I2C Bus data line. Bidirectional signal, electrical level +3.3V_S with a 2k2
Ω
pull-up resistor. This I2C signal is derived from Intel
®
NM10 Express Chipset
’
s General Purpose I/O pin GPIO7.
WDTRIG#: Watchdog Trigger Input. It is an active low signal, +3.3V_S voltage. This signal can be used to reset and restart, via Hardware, the embedded
microcontroller
’
s internal Watchdog Timer (which is usually managed via Software using QuadMo747-x2000 dedicated API - Application Program Interface -
libraries).
WDOUT: Watchdog event indicator Output. It is an active high signal, +3.3V_S voltage. When this signal goes high (active), it reports out to the devices on the
Carrier board that the embedded microcontroller
’
s internal Watchdog
’
s timer expired without being triggered, neither via HW nor via SW.
THRM#: Thermal Alarm Input. Active Low +3.3V_P voltage signal with 10k
Ω
pull-up resistor, directly managed by Intel
®
NM10 Express Chipset. This input gives
the possibility, to carrier board
’
s hardware, to indicate to the main module an overheating situation, so that the CPU can begin thermal throttling.
THRMTRIP#: Thermal trip output. Active Low +3.3V_S voltage signal with 4k7
Ω
pull-up resistor, directly managed by the Intel
®
Atom Cedarview family of CPUs.
This signal is used to communicate to the carrier board
’
s devices that, due to excessive overheating, the CPU began the shutdown in order to prevent physical
damages.
BIOS_DISABLE#:onboard BIOS Disable input, active Low +3.3V_A voltage signal with 10k
Ω
pull-up resistor. When this signal is pulled down on the carrier board,
then module
’
s SPI Flash will be disabled, and the module will boot using the BIOS code contained in an external Firmware Hub placed on LPC bus.
FAN_TACHOIN: External FAN Tachometer Input. +3.3V_S voltage signal, managed by ST Microelectronics STM32F100R4H6 microcontroller.
FAN_PWM_OUT: PWM output for FAN speed management, +3.3V_S voltage signal. It is managed by ST Microelectronics STM32F100R4H6 microcontroller.
SPKR: Speaker output, +3.3V_S voltage buffered signal, directly managed by Intel
®
NM10 Express Chipset
’
s embedded 8254 Timer (counter #2).
3.2.3.15
Manufacturing signals
According to Qseven
®
Standard specifications, rel. 2.0, on pin designed as MFG_NCx (pins 204, 207÷210) are carried the JTAG signal necessary to program
QuadMo747-x2000 embedded microcontroller.
The JTAG interface available on MFG_NCx pins is reserved only for the manufacturing phase; it must not be used by the customer.
It is not possible at all to use these pins to trace the software (for debug purposes).
