Seco Smarc SM-B79 User Manual Download

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SM-B79

Implementation of PTP (Precision Time Protocol)

WDT_TIME_OUT#: SMARC

module Watchdog Timer Signal. Active Low Output Signal, it reports that internal Watchdog

’

s timer expired without being triggered,

neither via HW nor via SW.

TEST#: SMARC

module Active Low Input Signal to invoke specific test function(s). Please refer to specific SMARC

module user manual intended to be used to

have details on what specific test functions this signal will enable. This signal can be also driven by 2-4 position of dual DIP switch SW14. To force this signal to be
always activated, set SW14 switch 2-4 in ON position, otherwise set in OFF position for normal operation (default)
SLEEP#: SMARC

module Sleep Button event signal input, used to bring the module in sleep state or wake it up again. Active Low Input signal. This signal can be

directly driven by SW5 pushbutton (par.3.3.30) and upon its pressure, the pulse of this signal will let the transition of the module from Working to Sleep status, or
vice versa

POWER_BTN#: Power Button event signal input, used to bring a system out of S5 soft off and other suspend states, as well as powering the system down. Active
low input signal. This signal can be directly driven by SW3 pushbutton (par.3.3.30) and upon its pressure, the pulse of this signal will let the switched voltage rails
turn on or off

SATA_ACT#: SMARC

module Serial ATA Activity Indicator. Active low output signal. This signal also drives the activation of diode LED D99, signalling working

condition when external storage device is attached (par.3.3.8)

SMB_CLK_BAT: Smart Battery System Management bus bidirectional clock line, +3.3V_DSW electrical level with 2.2k

, derived by I2C_PM_CK

signal

SMB_DAT_BAT: Smart Battery System Management bus bidirectional data line, +3.3V_DSW electrical level with 2.2k pull up resistor, derived by I2C_PM_DAT
signal

SMB_ALERT#: Smart Battery System Management bus Alert Interrupt Signal. Active low input signal, +3.3V_DSW electrical level with 7.5k

, derived

by SMARC

module SMB_ALERT# signal

RESET_OUT#: SMARC

module general purpose reset, active low output signal

RESET_IN#: SMARC

module general purpose reset, active low input signal. This signal can be directly driven by SW4 pushbutton (par.3.3.30) and upon its pressure,

the pulse of this signal will let the SMARC

module to perform a reset. There is jumper JP20 not mounted by default associated to this signal, used to prevent

SMARC

module from booting when runtime voltages are not good.

LID#: SMARC

module Lid open/close indication signal. Active low input signal. This signal can be directly driven by SW15 pushbutton (par.3.3.30) and upon its

pressure, the pulse of this signal will indicate the closure of an external lid (which module may use to initiate a sleep state). In addition, this signal can be also driven
by 1-3 position of dual DIP switch SW14. To force LID button simulation, set SW14 switch 1-3 in ON position, otherwise set in OFF position for normal operation
(default)
VIN_PWR_BAD#: SMARC

module Power bad indication signal. Active low input signal. To have this indication signal enabled, the 3-way jumper CN62 must be set

in 2-3 position. Otherwise, when set in 1-2 position (default) this control signal is disabled.