User manual

AIMB-273 User Manual 84
A.9 Power switch/HDD LED/SMBus/Speaker (JFP1)
The single board computer has its own buzzer. You can also connect it to the external
speaker on your computer chassis.
A.10 USB/LAN ports (LAN1_USB12/LAN2_USB34)
Table A.9: Power Switch/HDD LED/SMBus/Speaker (JFP1)
Pin Signal Pin Signal
1 SPK_P1 2 HDDLED+
3 PWR 4 NC
5 HDDLED- 6 GND
7 SPK_P3 8 SMB_DAT
9 SYS_RST( +) 10 SPK_P4
11 SMB_CLK 12 SYS_RST( -)
Table A.10: USB Port
Pin Signal Pin Signal
1VCC3Data0+
2 Data0- 4 GND
Table A.11: Ethernet 10/100 Mbps RJ-45 Port
Pin Signal Pin Signal
1XMT+5N/C
2XMT-6RCV-
3RCV+7N/C
4 N/C 8 N/C