www.d
fi
.com
Chapter 3 Hardware Installation
25
Chapter 3
Signal
Pin#
Pin Type
Pwr Rail /Tolerance
CH960 PU/PD
Module Base Specification R2.1 Description
COM Express Carrier Design Guide R2.0 Description
THRM#
B35
I CMOS
3.3V / 3.3V
PU 10K
ɏ
to 3.3V
Input from off-Module temp sensor indicating an over-temp situation.
Thermal Alarm active low signal generated by the external
hardware to indicate an over temperature situation. This signal
can be used to initiate thermal throttling.
THRMTRIP#
A35
O CMOS
3.3V / 3.3V
PU 10K
ɏ
to 3.3V
Active low output indicating that the CPU has entered thermal shutdown.
Thermal Trip indicates an overheating condition of the
processor. If 'THRMTRIP#' goes active the system immediately
transitions to the S5 State (Soft Off).
Signal
Pin#
Pin Type
Pwr Rail /Tolerance
CH960 PU/PD
Module Base Specification R2.1 Description
COM Express Carrier Design Guide R2.0 Description
SMB_CK
B13
I/O OD CMOS 3.3V Suspend/3.3V
PU 2.2K
ɏ
to 3.3V
Suspend
System Management Bus bidirectional clock line.
System Management Bus bidirectional clock line
SMB_DAT
B14
I/O OD CMOS 3.3V Suspend/3.3V
PU 2.2K
ɏ
to 3.3V
Suspend
System Management Bus bidirectional data line.
System Management bidirectional data line.
SMB_ALERT#
B15
I CMOS
3.3V Suspend/3.3V
PU 2.2K
ɏ
to 3.3V
Suspend
System Management Bus Alert – active low input can be used to generate
an SMI# (System Management Interrupt) or to wake the system.
System Management Bus Alert
Signal
Pin#
Pin Type
Pwr Rail /Tolerance
CH960 PU/PD
Module Base Specification R2.1 Description
COM Express Carrier Design Guide R2.0 Description
GPO0
A93
GPO1
B54
GPO2
B57
GPO3
B63
GPI0
A54
PU 47K
ɏ
to 3.3V
GPI1
A63
PU 47K
ɏ
to 3.3V
GPI2
A67
PU 47K
ɏ
to 3.3V
GPI3
A85
PU 47K
ɏ
to 3.3V
Signal
Pin#
Pin Type
Pwr Rail /Tolerance
CH960 PU/PD
Module Base Specification R2.1 Description
COM Express Carrier Design Guide R2.0 Description
VCC_12V
A104~A109
B104~B109
C104~C109
D104~D109
Power
Primary power input: +12V nominal. All available VCC_12V pins on the
connector(s) shall be used.
VCC_5V_SBY
B84~B87
Power
Standby power input: +5.0V nominal. If VCC5_SBY is used, all
available VCC_5V_SBY pins on the connector(s) shall be used. Only
used for standby and suspend functions. May be left unconnected if
these functions are not used in the system design.
VCC_RTC
A47
Power
Real-time clock circuit-power input. Nom3.0V.
Thermal Protection Signals Descriptions
SMBUS Signals Descriptions
General Purpose Outputs for system specific usage.
General Purpose Input for system specific usage. The signals are
pulled up by the Module.
Power and GND Signal Descriptions
I CMOS
3.3V / 3.3V
General purpose input pins. Pulled high internally on the Module.
GPIO Signals Descriptions
O CMOS
General purpose output pins. Upon a hardware reset, these outputs should
be low.
3.3V / 3.3V
