ADLINK Technology LitleBoard 800 Reference Manual

Contents

ADLINK Technology LitleBoard 800 Reference Manual Manual pdf 32 page image

Chapter 3 Hardware26 Reference Manual LittleBoard 800Utility InterfacesThe Utility interfaces consist of three connectors that provide the standard interface signals for the followingdevices:• Utility 1 (J15)♦ Keyboard♦ External battery connection♦ Reset Switch♦ Speaker• Utility 2 (J13)♦ PS/2 Mouse♦ Infrared (IrDA) signals♦ SMBus signals♦ USB signals for USB ports 1 and 2♦ Power button signal• Utility 3 (J14)♦ USB signals for USB ports 3 and 4Utility 1 InterfaceThe Utility 1 (J15) interface uses a 16-pin header and provides the various interface signals to an external I/O board with external connections for the respective connectors such as, keyboard, speaker, etc. Table 3-7provides the pin signals for the Utility 1 interface, which uses 16 pins, 2 rows, odd/even, (1, 2) with 0.100"pitch.• Keyboard• Battery• Reset Switch• Speaker• External voltages (-5V In, -12V In, +3.3V Out to Power On LED)Keyboard InterfaceThe signal lines for a PS/2 keyboard are provided through the Utility 1 interface, which is also fully PC/ATcompatible.External BatteryAn external battery input connection is provided through a Utility 1 interface for the Real Time Clock’soperation in the event the on-board battery is not used.Reset SwitchThe signal lines for a reset switch are provided through the Utility 1 interface.NOTE To perform the equivalent of a power-on reset, the reset button must be pressedand held for a minimum of three seconds.