User’s Manual
ASUS TUF GAMING B450-PLUS II
1-5
14. SPI TPM header
This header supports a Trusted Platform Module
(TPM) system with a Serial Peripheral Interface (SPI),
allowing you to securely store keys, digital certicates,
passwords, and data. A TPM system also helps
enhance network security, protects digital identities,
and ensures platform integrity.
15. 20-5 pin System Panel header
This connector supports several chassis-mounted functions.
• System power LED (4-pin +PWR_LED-)
This 2-pin connector is for the system power LED.
Connect the chassis power LED cable to this connector.
The system power LED lights up when you turn on the
system power, and blinks when the system is in sleep
mode.
• Hard disk drive activity LED (2-pin +HDD_LED-)
This 2-pin connector is for the HDD Activity LED.
Connect the HDD Activity LED cable to this connector.
The HDD LED lights up or flashes when data is read from
or written to the HDD.
• System warning speaker (4-pin SPEAKER)
This 4-pin connector is for the chassis-mounted system warning speaker. The speaker
allows you to hear system beeps and warnings.
• ATX power button/soft-off button (2-pin PWR_SW)
This connector is for the system power button. Pressing the power button turns the
system on or puts the system in sleep or soft-off mode depending on the operating
system settings. Pressing the power switch for more than four seconds while the
system is ON turns the system OFF.
• Reset button (2-pin RESET)
This 2-pin connector is for the chassis-mounted reset button for system reboot without
turning off the system power.
16. BIOS Flashback™ LED
The FlashBack™ LED lights up or blinks to indicate the status of the BIOS
FlashBack™.
Scan the QR code for more information on BIOS FlashBack™
function.
TPM
PIN 1
S_SPI_TPM_IRQ#
S_SPI_TPM_CS2#
F_BIOS_WP#_R
GND
T_SPI_CLK
T_SPI_MOSI
VCCSPI
S_PLTRST#
NC
+1.8V_SPI
F_SPI_CS0#_R
T_SPI_MISO
F_SPI_HOLD#_R
PLED+
PLED-
PWR
Ground
+5V_SPKO
Ground
Ground
Speaker
HDD_LED+
HDD_LED-
Ground
RESET
NC
PLED+
PLED-
PIN 1
+PWR_LED-
+PWR_LED-
SPEAKER
PANEL
+HDD_LED-
PWR_SW
RESET
* Requires an ATX power supply
E17223_TUF_GAMING_B450-PLUS_II_UM.indb 5E17223_TUF_GAMING_B450-PLUS_II_UM.indb 5 2020/9/16 9:30:122020/9/16 9:30:12