User`s manual

RabbitCore RCM2000
4.5 Other Hardware.................................................................................................................................. 32
4.5.1 Clock Doubler ............................................................................................................................ 32
4.5.2 Spectrum Spreader...................................................................................................................... 33
4.6 Memory.............................................................................................................................................. 34
4.6.1 SRAM......................................................................................................................................... 34
4.6.2 Flash EPROM............................................................................................................................. 34
4.6.3 Dynamic C BIOS Source Files................................................................................................... 34
Chapter 5. Software Reference 35
5.1 More About Dynamic C..................................................................................................................... 35
5.1.1 Using Dynamic C ....................................................................................................................... 36
5.2 I/O....................................................................................................................................................... 38
5.2.1 PCLK Output.............................................................................................................................. 38
5.3 Serial Communication Drivers........................................................................................................... 39
5.4 Upgrading Dynamic C ....................................................................................................................... 40
5.4.1 Extras.......................................................................................................................................... 40
Appendix A. Specifications 41
A.1 Electrical and Mechanical Specifications.......................................................................................... 42
A.1.1 Headers...................................................................................................................................... 45
A.2 Bus Loading ...................................................................................................................................... 46
A.3 Rabbit 2000 DC Characteristics........................................................................................................ 48
A.4 I/O Buffer Sourcing and Sinking Limit............................................................................................. 49
A.5 Conformal Coating............................................................................................................................ 50
A.6 Jumper Configurations ...................................................................................................................... 51
Appendix B. Prototyping Board 53
B.1 Overview of the Prototyping Board................................................................................................... 54
B.2 Mechanical Dimensions and Layout ................................................................................................. 55
B.3 Power Supply..................................................................................................................................... 57
B.4 Using the Prototyping Board............................................................................................................. 58
B.4.1 Adding Other Components........................................................................................................ 61
Appendix C. Power Management 63
C.1 Power Supplies.................................................................................................................................. 63
C.1.1 Batteries and External Battery Connections.............................................................................. 63
C.1.2 Battery-Backup Circuit.............................................................................................................. 64
C.1.3 Power to VRAM Switch............................................................................................................ 65
C.1.4 Reset Generator.......................................................................................................................... 65
C.2 Chip Select Circuit............................................................................................................................. 66
Appendix D. Sample Circuits 67
D.1 RS-232/RS-485 Serial Communication ............................................................................................ 68
D.2 Keypad and LCD Connections.......................................................................................................... 69
D.3 LCD Connections.............................................................................................................................. 70
D.4 External Memory............................................................................................................................... 71
D.5 Simple D/A Converter....................................................................................................................... 72
Index 73
Schematics 75