
Chapter 5: Advanced Motherboard Setup
5-17
Power I2C
The JPI2C1 header is for power I
2
C, which
may be used to monitor the status of the power
supply, fan and system temperature. See the
table on the right for pin defi nitions.
Power I
2
C
Pin Defi nitions
(JPI2C1)
Pin# Defi nition
1 Data
2 Ground
3 Clock
4NC
Overheat LED
Connect an LED to the JOH1 header to
provide warning of chassis overheating. See
the table on the right for pin defi nitions.
Overheat LED
Pin Defi nitions
(JOH1)
Pin# Defi nition
1 3.3V
2 OH Active
Trusted Platform Module Header
The JTPM1 header is used to connect a
Trusted Platform Module (TPM), available
separately from a third-party vendor. A TPM
is a security device that allows encryption
and authentication of hard drives, disallowing
access if the TPM associated with it is not
installed in the system. See the table on the
right for pin defi nitions.
Trusted Platform Module Header
Pin Defi nitions (JTPM1)
Pin# Defi nition Pin# Defi nition
1 LCLK GND
3 LFRAME No Pin
5 LRESET VCC5
7 LAD3 LAD2
9 VCC3 LAD1
11 LAD0 GND
13 RSV0 RSV1
15 SB3V SERIRQ
17 GND CLKRUN
19 LPCPD RSV2
IPMB
A System Management Bus header for the
IPMI slot is located at IPMB. Connect the
appropriate cable here to use the IPMB I2C
connection on your system.
IPMB
Pin Defi nitions
Pin# Defi nition
1 Data
2 Ground
3 Clock
4 No Connection
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