User`s manual

RabbitCore 2000
Appendix B. Prototyping Board .......................................................................................35
B.1 Mechanical Dimensions and Layout........................................................................................ 36
B.2 Power Supply........................................................................................................................... 37
B.3 Using the Prototyping Board ................................................................................................... 37
B.3.1 Adding Other Components..................................................................................... 40
Appendix C. Power Management.....................................................................................41
C.1 Power Supplies......................................................................................................................... 42
C.1.1 Batteries and External Battery Connections........................................................... 42
C.1.2 Battery Backup Circuit........................................................................................... 43
C.1.3 Power to VRAM Switch......................................................................................... 44
C.1.4 Reset Generator ...................................................................................................... 45
C.2 Chip Select Circuit................................................................................................................... 45
Appendix D. Sample Circuits ...........................................................................................47
D.1 RS-232/RS-485 Serial Communication................................................................................... 48
D.2 Keypad and LCD Connections ................................................................................................ 49
D.3 LCD Connections .................................................................................................................... 50
D.4 External Memory..................................................................................................................... 51
D.5 D/A Converter.......................................................................................................................... 52
Schematics