μ
Q7-962
μ
Q7-962 User Manual - Rev. First Edition: 1.0 - Last Edition: 3.1 - Author: S.B. - Reviewed by P.Z Copyright © 2016 SECO S.r.l.
35
3.2.1.13
Power Management signals
According to Qseven
®
specifications, on the golden edge finger connector there is a set of signals that are used to manage the power rails and power states. The
signals involved are:
PWGIN: Power Good Input, +5V_S tolerant active high signal. It must be driven on the carrier board to signal that power supply section is ready and stable. When
this signal is asserted, the module will begin the boot phase. The signal must be kept asserted for all the time that the module is working.
PWRBTN#: Power Button Input, active low +3.3V_A electrical voltage signal, with 10k
Ω
pull-up resistor. When working in ATX mode, this signal can be connected
to a momentary push-button: a pulse to GND of this signal will switch power supply On or Off.
RSTBTN#: Reset Button Input, active low +3.3V_S electrical voltage signal, with 10k
Ω
pull-up resistor. This signal can be connected to a momentary push-button:
a pulse to GND of this signal will reset the Qseven
®
module.
BATLOW#: Battery Low Input, active low +3.3V_A electrical voltage signal, with 10k
Ω
pull-up resistor. This signal can be driven on the carrier board to signal that
the system battery is low, or that some battery-related event has occurred. Can be left unconnected if not used
WAKE#: Wake Input, active low +3.3V_A electrical voltage signal with 10k
Ω
pull-up resistor and series Schottky diode. This signal can be driven low, on the carrier
board, to report that a Wake-up event has occurred, and consequently the module must turn itself on. It can be left unconnected if not used.
SUS_STAT#: Suspend status output, active low +3.3V_A electrical voltage signal, with 10k
Ω
pull-up resistor. This output can be used to report to the devices on
the carrier board that the module is going to enter in one of possible ACPI low-power states.
SUS_S3#: S3 status output, active low +3.3V_A electrical voltage signal, with 10k
Ω
pull-down resistor. This signal must be used, on the carrier board, to shut off
the power supply to all the devices that must become inactive during S3 (Suspend to RAM) power state.
SUS_S4#: S4 status output, active low +3.3V_A electrical voltage signal, with 10k
Ω
pull-down resistor. This signal is used, on the carrier board, to shut off the
power supply to all the devices that must become inactive only during S4 (Suspend to Disk) power state.
SLP_BTN#: Sleep button Input, active low +3.3V_A electrical level signal, with 10k
Ω
pull-up resistor. This signal can be driven, using a pushbutton on the carrier
board, to trigger the transition of the module from Working to Sleep status, or vice versa. It can be left unconnected if not used on the carrier board.
3.2.1.14
Miscellaneous signals
Here following, a list of signals that complete the features of
μ
Q7-962 module.
GPIO_6: This signal is carried on the pin usually dedicated to LVDS DisplayID DDC Data line. On the
μ
Q7-962 module, instead, it can be used as a Generic
Purpose I/O, electrical level +3.3V_S with a 4k7
Ω
pull-up resistor. It is connected to i.MX6 processor
’
s GPIO_6 pad.
GPIO_19: This signal is carried on the pin usually dedicated to LVDS DisplayID DDC Clock line. On the
μ
Q7-962 module, instead, it can be used as a Generic
Purpose I/O, electrical level +3.3V_S. It is connected to i.MX6 processor
’
s GPIO_19 pad.
SMB_CLK: SM Bus control clock line for System Management. Bidirectional signal, electrical level +3.3V_S with a 4k7
Ω
pull-up resistor. It is managed by i.MX6
processor
’
s I2C1 controller.
