Specifications

Contents
iv Reference Manual LittleBoard 735
ATX Power Interface ............................................................................................................... 35
Power-On Button Interface.......................................................................................................35
Miscellaneous................................................................................................................................ 36
Real Time Clock (RTC) ........................................................................................................... 36
Temperature Monitoring .......................................................................................................... 36
User GPIO Signals................................................................................................................... 36
SMBus Interface....................................................................................................................... 37
Oops! Jumper (BIOS Recovery) .............................................................................................. 37
Serial Console.......................................................................................................................... 37
Serial Console Setup .......................................................................................................... 37
Hot (Serial) Cable .............................................................................................................. 38
Watchdog Timer....................................................................................................................... 38
Optional CPU Fan .................................................................................................................... 38
Battery Input............................................................................................................................. 39
Chapter 4 BIOS Setup .............................................................................................................. 41
Introduction.................................................................................................................................... 41
Entering BIOS Setup (VGA Display) ........................................................................................ 41
Entering BIOS Setup (Serial Console) ..................................................................................... 41
PCI-ISA Bridge Mapping ............................................................................................................... 42
Logo Screen Utility (Splash Screen) .............................................................................................43
Logo Screen Image Requirements ......................................................................................... 43
Appendix A Technical Support .................................................................................................. 45
Index .................................................................................................................................................. 47
List of Figures
Figure 2-1. Stacking PC/104 Modules with the LittleBoard 735 ................................................ 4
Figure 2-2. Functional Block Diagram ....................................................................................... 7
Figure 2-3. Component Locations (Front view) ......................................................................... 9
Figure 2-4. Component Locations (Back view) ........................................................................ 10
Figure 2-5. Pin Sequence Identification................................................................................... 12
Figure 2-6. Connector Locations (Top view)............................................................................ 13
Figure 2-7. LittleBoard 735 Dimensions .................................................................................. 16
Figure 3-1. RS485 Serial Port Implementation ........................................................................ 22
Figure 3-2. Oops! Jumper Connection..................................................................................... 37
Figure 3-3. Hot Cable Jumper ................................................................................................. 38
List of Tables
Table 2-1. Major Integrated Circuit Descriptions and Functions............................................... 8
Table 2-2. Header and Connector Descriptions ..................................................................... 10
Table 2-3. Jumper Settings .................................................................................................... 14
Table 2-4. Weight and Footprint Dimensions ......................................................................... 14
Table 2-5. Environmental Requirements ................................................................................ 15
Table 2-6. Power Supply Requirements................................................................................. 15
Table 3-1. Interrupt Channel Assignments ............................................................................. 18
Table 3-2. Memory Map ......................................................................................................... 19
Table 3-3. I/O Address Map ................................................................................................... 19
Table 3-4. Parallel Interface Pin Signals (J16) ....................................................................... 21
Table 3-5. Serial A Interface Pin Signals (J11)....................................................................... 23
Table 3-6. Serial B Interface Pin Signals (J12)....................................................................... 24