Asus PRIME B650M-A AX II - Product Introduction (Continued); COM Port Header; Front Panel Audio Header; S;PDIF Out Header

1-6
DO NOT short-circuit the pins except when clearing the RTC RAM. Short-circuiting or
placing a jumper cap will cause system boot failure!
If the steps above do not help, remove the onboard button cell battery and short the two
pins again to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the button
cell battery.
14. COM Port header
The COM (Serial) Port header allows you to connect a COM port module.
Connect the COM port module cable to this header, then install the module
to a slot opening on the system chassis.
The COM port module is purchased separately.
15. Front Panel Audio header
This header is for a chassis-mounted front panel audio I/O module that
supports HD audio standard. Connect one end of the front panel audio
I/O module cable to this header.
We recommend that you connect a high-denition front panel audio
module to this header to avail of the motherboard’s high-denition
audio capability.
16. S/PDIF Out header
This header is for an additional Sony/Philips Digital Interface (S/PDIF) port.
Connect the S/PDIF Out module cable to this header, then install the module to
a slot opening at the back of the system chassis.
The S/PDIF module is purchased separately.
17. Speaker header
The 4-pin header is for the chassis-mounted system warning speaker. The
speaker allows you to hear system beeps and warnings.
18. 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
certicates, passwords, and data. A TPM system also helps enhance
network security, protects digital identities, and ensures platform integrity.
The TPM module is purchased separately.
PIN 1
DCD
TXD
GND
RTS
RI
RXD
DTR
DSR
CTS
COM
PORT1L
PORT1R PORT2R
SENSE_SEND
PORT2L
AGND NC SENSE1_RETUR SENSE2_RETUR
AAFP
PIN 1
HD-audio-compliant
pin definition
SPDIF_OUT
+5V SPDIFOUT GND
+5V GND GND Speaker Out
SPEAKER
PIN 1
TPM
PIN 1
F_SPI_HOLD#_R T_SPI_MISO F_SPI_CS0#_R F_SPI_PWR NC H_PCIE_RST# VCCSPI
T_SPI_MOSI
T_SPI_CLK
GND
TPM_DETECT_L
S_SPI_TPM_CS2#
S_SPI_TPM_IRQ#
Chapter 1: Product Introduction