User`s manual

User’s Manual
Appendix C. Power Supply 81
C.1 Power Supplies...................................................................................................................................81
C.1.1 Batteries and External Battery Connections...............................................................................81
C.1.2 Power to VRAM Switch.............................................................................................................83
C.1.3 Reset Generator ..........................................................................................................................83
C.2 Chip Select Circuit.............................................................................................................................84
Appendix D. Sample Circuits 85
D.1 RS-232/RS-485 Serial Communication.............................................................................................86
D.2 Keypad and LCD Connections ..........................................................................................................87
D.3 External Memory ...............................................................................................................................88
D.4 D/A Converter....................................................................................................................................89
Index 91
Schematics 93