Page 371 - Embedded Microprocessor Systems Real World Design

Counters for timers process of, 18
count ambiguity considerations, 114 in RAM, 193-194
description of, 109-111 read from ROM, 1761 77
CPU real-time operating system, 252
on a chip, 267 reasons for, 171-172
clock, 110 registers, 193-194, 282
on a module, 267 serial condition monitor, 182-188
single, 2425 simulators for, 135
Crosscompiler, 18 software throughput and, 177-178
Crystals software timing and, 177
ceramic resonators and, comparisons source-level, 132
between, 92 system integration of
fundamental mode, 92 hardware testing, 190-191
schematic representation of, 91f overview of, 189-190
series vs. parallel, 90,92 problem log, 197-198
Cyclic redundancy check, 219 RAM use, 193-194
software testing, 191-193
Daisychained interrupts, 148-149, 155 stress testing, 196-197
Data bus test plan, 194-196
buffers, 69-70,86 tools for, 134-135
description of, 33 write to ROM, 175-176
loading, 68-70 Decoding
Data flow diagram circuits, 55-57, 56f
definition of, 120 linear, 86
for pool pump timer system, 120f, 122f partial, 86
Data hold time Define Task, 247
calculations of, 44, 48 Define Timeslice, 248
for EPROM, 44 Design system
extended, 64, 64-65 development of
problems with, 63 costs, 19-20
Data setup time environment, 10-11, 17-19
description of, 46 history, 17-18
problems with, 63 distributed systems. see Distributed
Data strobe, 62 processor systems
Deactivate Task, 247 hardware requirements, 20-22
Deadlines, 138 hardware/software partitioning, 22-24
Debouncing, 169 microprocessor selection. see Micro-
Debugger, 18 processor, selection criteria for
Debugging shortcuts, 85-86
action codes, 172-1 73 software requirements, 20-22
background debugging mode, 194,283 steps involved in, 1-2
breakpoint for evaluating, 180-181, 192 Development compiler. see Compiler
circular trace buffers, 178-179 Development language
difficulties associated with, 19 considerations when selecting
emulator use, 19, 171-172, 191,192-193, assembly support, 133-134
201-202 code/storage size, 132-133
example of, 198-201 debugging tools, 134-135
hardware output for, 173-1 75 emulator support, 132
interrupt effects on, 169 optimization, 133
levels of, 18 processors supported, 132
logic analyzer breakpoints, 180-181 description of, 131-132
memory dumps and, 181-182 high-level, 131-1 32
monitor programs, 18, 179-180, 193 Differential interfaces, 88-89
onchip, 282-284 Digital logic, 315-316

352 Index