APPENDIX C Digital Systems C.1. C.2. C.3. C.4. C.5. C.6. C.7. C.8. C.9. C.10. Chapter Outline Encoder and Decoder 367 Multiplexer, Demultiplexer and Buffer Registers and Memory 371 Memory Address Decoding 372 Counters and Timers 373 Serial and Shift Registers 374 Arithmetic and Logic Unit 375 Processor Control 376 CPU System Operation 376 PIC16 MCU Operation 379 368 The basic set of digital devices described in Appendix B is enough to build working data systems; these can be combined into circuit blocks which can in turn be incorporated into more complex digital systems. Some of these system blocks can be built from or supplied as discrete