Ampro Little Board 700, Reference Manual

Page: 53 / 90

Chapter 3 Hardware
LittleBoard 700 Reference Manual 47
Table 3-18. Utility 2 Interface Pin/Signal Descriptions (J24)
Pin # Signal I/O Description
1 NC - NC
2 PWRBT* I Power Button
3 BATLOW* I- Low Battery
4 NC O Not Connected (IR Mode Select)
5 IRTX O IR Transmit Data
6 IRRX I IR Receive Data
7 GND - Ground
8 VCC - +5V
9 MDATA I/O Mouse Data
10 MCLK I/O Mouse Clock
11 GND - Ground
12 VCC - +5V
13 SMBCLK - SMBus Clock
14 SMBDATA - SMBus Data
15 USB1PWR - +5V USB Port Power – Port is disabled if this input is low.
16 USB2PWR - +5V USB Port Power – Port is disabled if this input is low.
17 USBP1- I/O USB 1 Signal -
18 USBP2- I/O USB 2 Signal -
19 USBP1+ I/O USB 1
20 USBP2+ I/O USB 2
21 USB1GND - USB Port ground
22 USB2GND -
USB Port ground
23 SHIELD1 -
USB Port shield (Cable Shield)
24 SHIELD2 - USB Port shield (Cable Shield)
Notes:
The shaded area denotes power or ground. The signals marked with * = Negative true logic.