Asus Prime B660M-AJ D4 Manual page 15

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-definition front panel
audio module to this header to avail of the motherboard's high-
definition audio capability.
• If you want to connect a high-definition front panel audio module
to this header, set the Front Panel Type item in the BIOS Setup
to [HD Audio]. By default, this header is set to [HD Audio].
16. LPT header
The LPT (Line Printing Terminal) header supports devices such as
a printer. LPT standardizes as IEEE 1284, which is the parallel port
interface on IBM PC-compatible computers.
17. M.2 slot (Key E)
This socket connects to an M.2 Wi-Fi device.
18. 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.
19. 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 certificates, passwords, and
data. A TPM system also helps enhance network security,
protects digital identities, and ensures platform integrity.
The SPI_TPM module is purchased separately.
20. System Panel header
This header supports several chassis-mounted functions.
• System power LED (4-pin PLED)
This 4-pin header is for the system power LED. Connect the
chassis power LED cable to this header. 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 header is for the HDD Activity LED. Connect the
HDD Activity LED cable to this header. The HDD LED lights
up or flashes when data is read from or written to the HDD.
PRIME B660M-AJ D4
AAFP
HD-audio-compliant
pin definition
PIN 1
SPDIF_OUT
TPM
PIN 1
VCCSPI S_SPI_TPM_IRQ#
S_PLTRST# S_SPI_TPM_CS2#
F2_SPI_CS1#_R F_BIOS_WP#_R
+3V_SPI GND
F_SPI_CS0#_R T_SPI_CLK
T_SPI_MOSI
T_SPI_MISO
F_SPI_HOLD#_R
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