95 AIMB-581 User Manual
Appendix B I/O Pin Assignments
B.10 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.
B.11 USB/LAN ports (LAN1_USB12/LAN2_USB34)
Table B.10: 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 GND
Table B.11: USB Port
Pin Signal Pin Signal
1VCC3Data0+
2 Data0- 4 GND
Table B.12: Ethernet 10/100 Mbps RJ-45 Port
Pin Signal Pin Signal
1XMT+5N/C
2 XMT- 6 RCV-
3RCV+7N/C
4N/C8N/C
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