Q7-C72
Q7-C72 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Authors: A.R - Reviewed by M.B. - Copyright © 2021 SECO S.p.A
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that must become inactive only during S5 (Soft Off) power state.
3.2.14
Miscellaneous, Thermal Management and Fan control signals
Here following, a list of Qseven
®
compliant signals that complete the features of µQ7-C72 module.
WDTRIG#: Watchdog Trigger Input. It is an active low signal, +3.3V_ALW voltage. This signal can be used to reset and restart, via Hardware, the internal Watchdog
Timer (which is usually managed via Software using µQ7-C72 dedicated API - Application Program Interface - libraries).
WDOUT: Watchdog event indicator Output. It is an active high signal, +3.3V_ALW voltage. When this signal goes high (active), it reports out to the devices on the
GP0_I2C_CLK: general purpose I2C Bus clock line. Bidirectional signal, electrical level +3.3V_RUN with a 1
l-
I2C
controller. 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), High-speed
mode (bitrate up to 3.4Mbps).
GP0_I2C_DAT: general purpose I2C Bus data line. Bidirectional signal, electrical level +3.3V_RUN with a 1
-
controller.
SMB_CLK: SM Bus control clock line for System Management. Bidirectional signal, electrical level +3.3V_RUN with a 1
-up resistor
SMB_DAT: SM Bus control data line for System Management. Bidirectional signal, electrical level +3.3V_RUN with a 1
-up resistor
SMB_ALERT#: SM Bus Alert line for System Management. Bidirectional signal, active low, electrical level +3.3V_RUN with a 10
-up resistor. Any device place
on the SM Bus can drive this signal low to signal an event on the bus itself.
THRMTRIP#: Thermal Trip Output. Active Low, +3.3V_RUN voltage signal Thermal Trip indicates an overheating condition of the processor. When goes active, the
system immediately transitions to the S5 State (Soft Off).
GP_PWM_OUT1: General purpose PWM output (Open Drain signal).
BOOT_ALT#: Boot Alternate Input. This signal and USB_VBUS (only for i.MX 8M Mini) allow different options for selecting boot device type. See following tables.
i.MX 8M Nano
BOOT_ALT#
Boot device
Tied to GND
µSD
Floating/ 3.3V
eMMC
i.MX 8M Mini
BOOT_ALT#
USB_VBUS
Boot device
Tied to GND
Host mode
µSD
Floating/ 3.3V
Host mode
USB1 OTG
Floating/ 3.3V
Client mode
eMMC
