CCOMe-C79
CCOMe-C79 - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by E.S. Copyright © 2021 SECO S.p.A.
52
Feature pin Header
For further expandability of the system, on board there is an expansion
connector, which carries out the signals related to I2C bus, SM Bus,
Watchdog and Power Management signals. These signals allow
implementing, through external expansion modules, further functionalities
that are not already realised by the carrier board.
For this purpose, it is available a dual row, 20 pin, P2.54mm standard pin
header, type ADIMPEX p/n LE008220-R or equivalent, with the pinout
shown in the table on the left.
All the signals available on this connector come out directly from the COM
Express connector.
Signal description:
SMB_CK: SM Bus control clock line for System Management, bidirectional signal
SMB_DAT: SM Bus control data line for System Management, bidirectional signal
I2C_CK: General purpose I2C port clock output
I2C_DAT: General purpose I2C port data I/O line
THRMTRIP#: Active low output signal. This signal is used to communicate that, due to excessive overheating, the CPU has entered thermal shutdown in order to
prevent physical damages
THRM#: Thermal Alarm Input from off-Module temperature sensor indicating an overheating situation, so that the CPU can begin thermal throttling. Active Low Input
signal
BUF_SUS_S3#:
s module, it is biased using a Ultra High Speed CMOS buffer. Active Low Output
Signal, +3.3V_ALW
system is in Suspend to RAM (S3) state.
BUF_SUS_S4#: this
module, it is biased using a Ultra High Speed CMOS buffer. Active Low Output
Signal, +3.3V_ALW
system is in Suspend to Disk (S4) state.
Feature internal pin header CN27
Pin Signal
Pin Signal
1
+3.3V_ALW (with 1.5 resettable fuse)
2
+3.3V_RUN (with 1.5 resettable fuse)
3
SMB_CK
4
I2C_CK
5
SMB_DAT
6
I2C_DAT
7
GND
8
GND
9
THRMTRIP#
10
THRM#
11
BUF_SUS_S5#
12
BUF_SUS_S4#
13
BUF_SUS_S3#
14
WDT
15
PWRBTN#
16
WAKE1#
17
SLEEP#
18
TPM_PP
19
GND
20
GND
