Page 380 - Embedded Microprocessor Systems Real World Design

State machine (s) Timing
description of, 129-130 access
incremental, 130 for EPROM, 42
multiple, 130 for RAM, 4548
STD bus, 265 acknowledge, 2 25-226
Stress testing of system, 19G-197 calculations, 54
Strobes cumulative errors and, 163-164, 227-228
data, 62 DMA, 79-80, 80f
read, 48, 49f, 54 DRAM, 49-50,51f
write, 48, 49f interrupt effects, 156
Superloop. see Polling loop(s) Microwire, 71f
Switch closure, 138 schematic representation of, 43f
Switch debouncing, 169 SDRAM, 276
Synchronization of software, 177
of distributed processor systems, 24 Timing logic
of multiprocessor systems, 226 description of, 328
functions of, 337
Task control block, 242 Toshiba
Tasks, in real-time operating system. see also TC59LM814,53
Multitasking TH50VSF0302, 100
communication between, 243-244 Trace data, for debugging
scheduling of, 244 circular trace buffers creating, 178-179
tracking of, 242 read from ROM, 176177
Task switch, 250 software timing and, 177
Test specifications, 1 Transceiver, 320
Timer Tristate, 106, 319
counters True/false notation, 319
count ambiguity considerations, 114
description of, 109-1 11 UART (universal asynchronous
description of, 107 receiver/transmitters) , 59, 67-68, 77,
design considerations for, 115 78f, 169, 183
ICs, 58 Update rate, 4
input capture, 109-110
interrupts caused by, 147, 153, 154f, Vector. see Interrupt vectors
163-164, 178 VME bus, 267
motor control, 113-1 14 von Neumann architecture, 14-15, 15f
for pool pump timer system example,
300f-301f Wait On, 248
PWM, 110, 114 Wait states
in real-time operating system, 246 bus types and, 36-38
reloading, l08f, 109 description of, 35-36,63
schematic diagram of, 108f dual-port RAM and, 212
temperature measurements, 11 1-1 13 extended data hold time and, 65
watchdog flash memory and, 277
description of, 81 integral generators, 36
electrostatic discharge protection sec- internal, 36
ondary to, 88 peripheral needing, 37
functions of, 81-82 timing of, 34, 36
mechanism of operation, 82, 83f Watchdog timer
sophisticated types of, 82 built-in, 82
Timer code, 120 description of, 81
Time slicing electrostatic discharge protection sec-
definition of, 238 ondary to, 88
sequential scheduling and, 239 functions of, 81-82

Index 361