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Chapter 4: Motherboard Connections
4.2 Headers and Connectors
Fan Headers
There are six fan headers (FAN1-FAN6) on the motherboard. These are 4-pin fan headers,
although pins 1-3 are backward compatible with traditional 3-pin fans. Four-pin fans allow
fan speeds to be controlled by Thermal Management in the BMC. When using the Thermal
Management setting, use all 3-pin fans or all 4-pin fans.
Fan Header
Pin Definitions
Pin#
Definition
1
Ground (Black)
2
+12V (Red)
3
Tachometer
4
PWM Control
SGPIO Header
A Serial General Purpose Input/Output header (S-SGPIO2) is used to communicate with the
enclosure management chip on the backplane.
SGPIO Header
Pin Definitions
Pin#
Definition
Pin#
Definition
1
NC
2
NC
3
Ground
4
DATA Out
5
Load
6
Ground
7
Clock
8
NC
NC = No Connection
TPM Header
The JTPM1 header is used to connect a Trusted Platform Module (TPM)/Port 80, which
is available from Supermicro. 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 storage drive is not installed in the system. For more information
on the TPM:
www.supermicro.com/manuals/other/TPM.pdf
Trusted Platform Module/Port 80 Header
Pin Definitions
Pin#
Definition
Pin#
Definition
1
P3V3
2
SPI_TPM_CS_N
3
PCI-E_RESET_N#
4
SPI_PCH_MISO
5
SPI_PCH_CLK#
6
Ground
7
SPI_PCH_MOSI
8
N/A
9
JTPM1_P3V3A
10
IRQ_TPM_SPIN_N