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Chapter 4: Motherboard Connections
4.2 Headers and Connectors
Fan Headers
There are eight 4-pin fan headers (FAN1-FAN6, FANA-FANB) on the motherboard.
All these
4-pin fan headers are backwards compatible with the traditional 3-pin fans. However, fan
speed control is available for 4-pin fans only by Thermal Management via the BMC interface.
Refer to the table below for pin definitions.
Fan Header
Pin Definitions
Pin#
Definition
1
Ground
2
2.5A/+12V
3
Tachometer
4
PWM_Control
S-SGPIO Header
The S-SGPIO (Serial General Purpose Input/Output) header is used to communicate with the
enclosure management chip on the backplane. Refer to the tables below for pin definitions.
S-SGPIO Header
Pin Definitions
Pin#
Definition
Pin#
Definition
1
NC
2
NC
3
Ground
4
Data
5
Load
6
Ground
7
Clock
8
NC
NC = No Connection
TPM/Port 80 Header
The JTPM1 header is used to connect a Trusted Platform Module (TPM)/Port 80, which
is available from Supermicro (optional). A TPM/Port 80 connector is a security device that
supports encryption and authentication in hard drives. It allows the motherboard to deny
access if the TPM associated with the hard drive is not installed in the system. See the layout
below for the location of the TPM header. Please go to the following link for more information
on the TPM:
http://www.supermicro.com/manuals/other/TPM.pdf
.
Trusted Platform Module Header
Pin Definitions
Pin#
Definition
Pin#
Definition
1
+3.3V
2
SPI_CS#
3
RESET#
4
SPI_MISO
5
SPI_CLK
6
GND
7
SPI_MOSI
8
NC
9
+3.3V Stdby
10
SPI_IRQ#
