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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3.2.11
SPI interface signals
The signals related to SPI are as follows:
SPI_CS0#: SPI primary Chip select, active low output signal. Electrical level +3.3V_RUN
SPI_SCK: SPI Clock Output to carrie
3.3V_RUN
SPI_MISO: SPI0 Master Data Input, electrical level +3.3V_RUN. Input to i.MX 8M Mini / Nano from SPI devices embedded on the Carrier Board
SPI_MOSI: SPI0 Master Data Output, electrical level +3.3V_RUN. Output from i.MX 8M Mini / Nano to SPI devices embedded on the Carrier Board
SPI interface can support speed up to 20MHz.
3.2.12
CAN interface signals
The NXP i.MX 8M Mini and Nano processors provide as a factory option a Controller Area Network (CAN) interface through a Microchip MCP2518FD External CAN
FD Controller with SPI interface.
The signals related to CAN are as follows:
CAN0_TX: CAN transmitting signal, electrical level +3.3V_RUN with 10k pull-up resistor
CAN0_RX: CAN receiving signal, electrical level +3.3V_RUN with 10k pull-up resistor
Please consider that it is not possible to connect Qseven
®
CAN interface to any CAN Bus directly, it is necessary to integrate a CAN Bus Transceiver in the Carrier
board.
3.2.13
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_RUN 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_ALW voltage level with 100k pull-up resistor and 100nF filtering capacitor. 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_ALW voltage signal with 100
-up resistor and 100nF filtering capacitor. 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_ALW
-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_ALW
-up resistor. 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_S3#: S3 status output, active low +3.3V_ALW electrical voltage signal. 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_S5#: S5 status output, active low +3.3V_ALW electrical voltage signal. This signal is used, on the carrier board, to shut off the power supply to all the devices
