Seco Smarc CSM-B79 User Manual page 70

3.3.26 Feature Header
Feature header
Pin Signal
+5V_RUN (with 750mA resettable
1
fuse)
3 330Ohm Pull-up to 5V_RUN
5 GP_I2C_DAT_3V3
7 GP_I2C_CLK_3V3
9 SER1_TX
11 SER1_RX
13 CHARGING#
15 SUS_S3#_3V3
17 GND
19 CHARGER_PRSNT#
21 ---
23 GBE1_SDP
25 ---
27 WDT_TIME_OUT#
29 TEST#
31 BATLOW#
33 GBE0_SDP
35 SLEEP#
37 GND
39 POWER_BTN#
CSM-B79
CSM-B79 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: A.R - Reviewed by S.R. - Copyright © 2021 SECO S.p.A.
CN45
Pin Signal
+5V_ALW (with 750mA resettable
2
fuse)
4 SATA_ACT#
6 SMB_CLK_BAT
8 SMB_DAT_BAT
10 GND
+3V3_RUN (with 750mA
12
resettable fuse)
+3V3_ALW (with 750mA
14
resettable fuse)
+3V3_DSW (with 750mA
16
resettable fuse)
18 GND
20 SMB_ALERT#
22 SUS_S5#_3.3V_A
24 ---
26 SUS_S5#_3.3V_A
28 RESET_OUT#
30 LID#
32 SER3_TX
34 SER3_RX
36 RESET_IN#
38 GND
40 VIN_PWR_BAD#
For further expandability of the system, on CSM-B79 carrier board, are carried
others signals available from SMARC
For this purpose, it is available a dual row 40-pin p 2.54 mm pin header, type
ADIMPEX p/n LE008240-R.
Signal description:
GP_I2C_DAT_3V3: General Purpose I2C I/O Data Signal, derived from SMARC
I2C_GP_DAT with a set of back to back FETs to voltage translate. +3.3V_RUN
electrical level with 2k2 up resistor. Also carried to I2S Audio Header CN81
(par.3.3.17)
GP_I2C_CLK_3V3: General Purpose I2C Clock Output Signal, derived from
®
SMARC I2C_GP_CK with a set of back to back FETs to voltage translate.
Header CN81 (par.3.3.17)
®
SER1_TX / SER1_RX: SMARC module SER#1 Asynchronous Serial Data pairs,
routing to this header is driven by dual DIP switch SW7 (par.) that must set 1-3 switch
in OFF position
®
SER3_TX / SER3_RX: SMARC module SER#3 Asynchronous Serial Data pairs
SUS_S3#_3V3: Signal indicating the system is in Suspend to RAM (S3) state. Active
Low Output Signal with a 10
CARRIER_STBY#
SUS_S5#_3.3V_A: Signal indicating the system is in Soft Off (S5) state. Active Low
®
Output Signal, driven by SMARC
®
CHARGING#: SMARC module Battery Charging Input Signal, active low
®
CHARGER_PRSNT#: SMARC module Battery Charger Present Input Signal, active
low
®
BATLOW#: SMARC module Battery Low indication signal, active low
®
GBE0_SDP: SMARC module IEEE 1588 Trigger Signal for Hardware
Implementation of PTP (Precision Time Protocol)
®
GBE1_SDP: SMARC module IEEE 1588 Trigger Signal for Hardware
® cad edge connector.
. Also carried to I2S Audio
module CARRIER_PWR_ON
®
®
module
70