37
Chapter 4: Motherboard Connections
Power SMB (I
2
C) Header
The Power System Management Bus (I
2
C) connector (JPI
2
C1) monitors the power supply,
fan, and system temperatures. Refer to the table below for pin definitions.
Power SMB Header
Pin Definitions
Pin#
Definition
1
Clock
2
Data
3
PWRFAIL_N
4
Ground
5
NC
M.2 Slot
M.2 is formerly known as Next Generation Form Factor (NGFF) and is designed for internal
mounting devices. The M11SDV-8C-LN4F board has one M.2 connector at JMD2. Interfaces
are PCIEx4 and SATA 3.0.
COM Header
The motherboard has one COM port header (COM1) to provide a serial connection.
COM Port
Pin Definitions
Pin#
Definition
Pin#
Definition
1
SP_DCDA
6
SP_DSRA
2
SP_RXDA
7
SP_RTSA
3
SP_TXDA
8
SP_CTSA
4
SP_DTRA
9
SP_RIA
5
GND
10
NC
TPM/Port 80 Header
The JTPM1 header is used to connect a Trusted Platform Module (TPM). A TPM is a security
device that supports encryption and authentication in hard drives. It enables the motherboard
to deny access if the TPM associated with the hard drive is not installed in the system. Refer
to the table below for pin definitions.
Trusted Platform Module Header
Pin Definitions
Pin#
Definition
Pin#
Definition
1
LCLK
2
GND1
3
LFRAME#
4
No Pin
5
LRESET#
6
+5V/NC
7
LAD3
8
LAD2
9
+3.3V
10
LAD1
11
LAD0
12
GND2
13
SMB_CLK
14
SMB_DAT
15
+3.3V_DUAL 16
SERIRQ
17
GND3
18
CLKRUN#/NC
19
LPCPD#
20
LDRQ# (X)