SM-B79
SM-B79 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R - Reviewed by M.B. - Copyright © 2021 SECO S.p.A.
72
3.3.27
GPIO / FuSa Header
According to SMARC
®
Rel 2.1.1 specification, SMARC
®
modules foresee up to
fourteen general purpose I/O pins at 1.8V electrical level: GPIO0 to GPIO13.
Each of these can be configured as an input or output pin.
GPIO7 to GPIO13 are dedicated GPIOs, while the other seven GPIOs are multiplexed
pins supporting functions like Camera Power Enable, Camera Reset, Tachometer input,
PWM output etc. All these GPIOs, together with others signals from card edge
connector, are made available to a dual row, 28 pin, P2.54mm standard pin header,
type ADIMPEX p/n LE008228-R, with the pinout shown in the table on the left.
This connector can be also used to provide functional safety functions for FuSa
applications through signals listed in left table. Please be aware that FuSa functionality
can be obtained only in case that it is supported by the SMARC
®
modules used with
SM-B79 carrier board. Please refer to specific SMARC
®
module user manual for a signal
description related to this section (FuSa interface).
Signal description:
GPIO0 / CAM0_PWR#: SMARC
®
module GPIO0. This signal shares the same pin from
card edge connector with CAM0_PWR# (par.3.3.7)
GPIO1 / CAM1_PWR#: SMARC
®
module GPIO1. This signal shares the same pin from
card edge connector with CAM1_PWR# (par.3.3.7)
GPIO2 / CAM0_RST#: SMARC
®
module GPIO2. This signal shares the same pin from
card edge connector with CAM0_RST# (par.3.3.7)
GPIO3 / CAM1_RST#: SMARC
®
module GPIO3. This signal shares the same pin from
card edge connector with CAM1_RST# (par.3.3.7)
GPIO4 / HDA_RST#: SMARC
®
module GPIO4. This signal shares the same pin from
card edge connector with HDA_RST# (par.3.3.17)
GPIO5 / PWM_OUT: SMARC
®
module GPIO5. This signal shares the same pin from
card edge connector with PWM_OUT (par.3.3.21)
GPIO / FuSa Header CN92
Pin Signal
FuSa Interface
1
+5V_ALW (with 1.5 resettable fuse)
2
+12V_RUN (with 1.5 resettable fuse)
3
GND
4
GND
5
GPIO0 / CAM0_PWR#
FUSA_OKNOK0
6
GPIO1 / CAM1_PWR#
FUSA_OKNOK1
7
GPIO2 / CAM0_RST#
FUSA_ALERT#
8
GPIO3 / CAM1_RST#
FUSA_SPIS_CS#
9
GPIO4 / HDA_RST#
FUSA_SPIS_SCLK
10
GPIO5 /
PWM_OUT
FUSA_SPIS_MISO
11
GPIO6 / TACHIN
FUSA_SPIS_MOSI
12
RSVD3
FUSA_CHXPMICEN_IN
13
GPIO7
FUSA_CHXPMIC_EN
14
GPIO8
FUSA_CHXRLYSWITCH
15
GPIO9
FUSA_CHXOKNOK0
16
GPIO10
FUSA_CHXOKNOK1
17
GPIO11
FUSA_SPIM_CS#
18
GPIO12
FUSA_SPIM_SCLK
19
GPIO13
FUSA_SPIM_MISO
20
JTAG_RST# (P72)
FUSA_SPIM_MOSI
21
I2C_CAM1_CLK
FUSA_PROCHOT
22
JTAG_TRST# (P73)
FUSA_THERMTRIP
23
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