SM-B69
SM-B69 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author:A.R - Reviewed by M.B. - Copyright © 2020 SECO S.p.A.
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3.2.1.16
GPIO signals
The Embedded controller MEC1705 GPIO interface provides general purpose input monitoring and output control, as well as many other features for the GPIO
described on datasheet.
The signals involved in GPIO management are:
GPIO0 / CAM0_PWR#: General Purpose I/O #0, +1.8V_DSW electrical level
GPIO1 / CAM1_PWR#: General Purpose I/O #1, +1.8V_DSW electrical level
GPIO2 / CAM0_RST#: General Purpose I/O #2, +1.8V_DSW electrical level
GPIO3 / CAM1_RST#: General Purpose I/O #3, +1.8V_DSW electrical level
GPIO4 / HDA_RST#: General Purpose I/O #4, +1.8V_DSW electrical level
GPIO5 / PWM_OUT: General Purpose I/O #5, +1.8V_DSW electrical level
GPIO6 / TACHIN: General Purpose I/O #6, +1.8V_DSW electrical level
GPIO7: General Purpose I/O #7, +1.8V_DSW electrical level
GPIO8: General Purpose I/O #8, +1.8V_DSW electrical level
GPIO9: General Purpose I/O #9, +1.8V_DSW electrical level
GPIO10: General Purpose I/O #10, +1.8V_DSW electrical level
GPIO11: General Purpose I/O #11, +1.8V_DSW electrical level
GPIO12: General Purpose I/O #12, +1.8V_DSW electrical level
GPIO13: General Purpose I/O #13, +1.8V_DSW electrical level
3.2.1.17
Management pins
A set of signals are used by SM-B69 to communicate with carrier board for power management and indication status. Please refer to SMARC hardware specifications
ver. 2.1 for more detailed informations.
The signals involved are:
VIN_PWR_BAD#: Power Bad indication signal from the Carrier Board, active low signal from a voltage detection circuit
CARRIER_PWR_ON: Power On. Command to the Carrier Board. Output is set to +1.8V_ALW electrical level with a 10k pull-down resistor
CARRIER_STBY#: Stand By command to the Carrier Board. Output, active low signal, is set to +1.8V_ALW electrical level with a 10k pull-down resistor
RESET_OUT#: General Purpose Reset. Output, active low signal, +1.8V_RUN electrical level
RESET_IN#: General Purpose Reset. Input, active low signal, +3.3_ALW electrical level with a 10k pull-up resistor
POWER_BTN#: Power Button. Input, active low signal, +3.3_ALW electrical level with a 10k pull-up resistor
SLEEP#: Sleep indicator from Carrier board. Input, active low signal, +3.3_ALW electrical level with a 10k pull-up resistor
