MSC C6B-SLH
MSC C6B-SLH User Manual
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2.13.11
Serial Interface Signals
Signal
Pin
Type
Signal
Level
Power
Rail
Remark /
Tolerance
PU/PD/SR
Description
Source /
Target
SER0_TX
O
CMOS 3.3V
12V, 3mA
ePU = 49.9 KΩ
General purpose serial port transmitter (output)
PCH
SER0_RX
I
CMOS 3.3V
12V
ePU = 49.9 KΩ
General purpose serial port receiver (input)
PCH
SER1_TX
O
CMOS 3.3V
12V, 3mA
ePU = 49.9 KΩ
General purpose serial port transmitter (output)
PCH
SER1_RX
I
CMOS 3.3V
12V
ePU = 49.9 KΩ
General purpose serial port receiver (input)
PCH
2.13.12
Miscellaneous
Signal
Pin
Type
Signal
Level
Power
Rail
Remark /
Tolerance
PU/PD/SR
Description
Source / Target
I2C_CK
I/O
CMOS 3.3V Sus 3.3V
ePU = 2.2 KΩ General purpose I2C port clock output
PCH
I2C_DAT
I/O
CMOS 3.3V Sus 3.3V
ePU = 2.2 KΩ General purpose I2C port data I/O line
PCH
SPKR
O
CMOS 3.3V
3.3V, 4mA
Output for audio enunciator - the "speaker" in PC-AT systems
PCH
BIOS_DIS[1]#
I
CMOS 3.3V
ePU
= 10 KΩ Module BIOS disable input
Carrier board
logic circuit
BIOS_DIS[0]#
I
CMOS 3.3V
ePU = 10 KΩ Module BIOS disable input
Carrier board
logic circuit
WDT
O
CMOS 3.3V
ePD = 10 KΩ Active high output indicating that a watchdog time-out has occurred. Board Controller
FAN_PWMOUT
O
CMOS 3.3V
Fan speed control. Uses the Pulse Width Modulation (PWM)
technique to control the fan’s RPM.
Board Controller
FAN_TACHIN
I
CMOS 3.3V
ePU = 47 KΩ Fan tachometer input for a fan with a two pulse output.
Board Controller
TPM_PP
I
CMOS 3.3V
3.3V
ePD = 4.7 KΩ Trusted Platform Module (TPM) Physical Presence pin. Active high. TPM
NOTE: COM Express
®
Specification R2.1 redefines the I2C bus to be in the suspend plane 3.3V_SUS rather than in the 3.3V plane.