Q7-B03
Q7-B03 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: S.B. - Reviewed by G.G. Copyright © 2017 SECO S.r.l.
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PCU System Management Bus controller.
SMB_ALERT#: SM Bus Alert line for System Management. Bidirectional signal, electrical level +3.3V_A with a 1k
Ω
pull-up resistor. It is managed by the SOCs
’
PCU 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 1K
Ω
pull-up resistor. It is managed by the SOCs
’
I2C
controller #2. I2C Bus is able to work in Standard mode (bitrate up to 100Kbps), Fast mode (bitrate up to 400Kbps), Fast-mode Plus (bitrate up to 1Mbps).
GP0_I2C_DAT: general purpose I2C Bus data line. Bidirectional signal, electrical level +3.3V_S with a 1k
Ω
pull-up resistor. It is managed by the SOCs
’
I2C
controller #2.
WDTRIG#: Watchdog Trigger Input. It is an active low signal, +3.3V_S voltage, with 10k
Ω
pull-up resistor, managed by the STM32F100R4H6 microcontroller. This
signal can be used to reset and restart, via Hardware, the internal Watchdog Timer (which is usually managed via Software using Q7-B03 dedicated API -
Application Program Interface - libraries).
WDOUT: Watchdog event indicator Output. It is an active high signal, +3.3V_S voltage, managed by the STM32F100R4H6 microcontroller. When this signal goes
high (active), it reports out to the devices on the Carrier board that internal Watchdog
’
s timer expired without being triggered, neither via HW nor via SW.
THRM#: Thermal Alarm Input. Active Low +3.3V_S voltage signal with 100k
Ω
pull-up resistor, directly managed by ST Microelectronics STM32F100R4H6
microcontroller. This input gives the possibility, to carrier board
’
s hardware, to indicate to the main module an overheating situation, so that the SOC can begin
thermal throttling.
THRMTRIP#: Active Low +3.3V_S
the
SOC began the shutdown in order to prevent physical damages.
FAN_TACHOIN: External FAN Tachometer Input. +3.3V_S voltage signal with 10k
Ω
pull-up resistor, directly 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 signal, directly managed by the SoC.
3.2.1.16
Manufacturing signals
According to Qseven
®
Standard specifications, rel. 2.1, on pin designed as MFG_NCx (pins 204, 207÷210) are carried the JTAG signal necessary to program Q7-
B03 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)
