Biostar Z490GTA EVO User Manual page 18

TBT1: Thunderbolt 3 Header
This header allows user to add additional Thunderbolt ports on the PC front panel, and also
can be connected with a wide range of external peripherals.
F_AUDIO1: Front Panel Audio Header
This header allows user to connect the chassis-mount front panel audio I/O which supports HD
and AC'97 audio standards.
Note
» When using the front HD audio jack and plug in the headset, the rear sound will be automatically
Disabled.
» It is recommended that you connect a high-definition front panel audio module to this connector to
avail of the motherboard's high definition audio capability.
» Please try to disable the "Front Panel Jack Detection" if you want to use an AC'97 front audio output
cable. The function can be found via O.S. Audio Utility.
COM: Serial Port Header
The motherboard has a serial port header for connecting RS-232 Port.
18 | Chapter 2: Hardware installation
Pin Assignment
1 Force Power
2 NC
3 CIO Plug Event
4 SMB_DATA_MAIN
5 SLP_S3_N
6 SMB_CLK_MAIN
7 SLP_S5_N
8 3V3_AIC_PD_INT#
9 GND
10 GND
HD Audio AC'97
Pin Assignment Pin Assignment
1 Mic Left in 1 Mic In
2 Ground 2 Ground
3 Mic Right in 3 Mic Power
4 GPIO 4 Audio Power
5 Right line in 5 RT Line Out
6 Jack Sense 6 RT Line Out
7 Front Sense 7 Reserved
8 Key 8 Key
9 Left line in 9 LFT Line Out
10 Jack Sense 10 LFT Line Out
Pin Assignment
1 Carrier detect
2 Received data
3 Transmitted data
4 Data terminal ready
5 Signal ground
6 Data set ready
7 Request to send
8 Clear to send
9 Ring indicator
10 Key