TIA-422. See RS-422
TIA-485 79
See also RS-485
TIA-530 58 , 59
TIA-561 63
TIA-562 58 , 59
TIA-574 63
timeout
embedded system 245 , 249 , 257
.NET 160 , 190
TimeoutException 161
Timer component 192 – 193
token-passing protocol 269
topologies, network 125 – 127
transceiver. See RS-485: chips 79
transient protection. See surge protection
transmission line. See long line
transmission velocity 109
Transmit data pin. See TX
transmitter. See specific interface
triaxial cable 131
TSB-89-A 79
TSOP7000 148
TSR 231
TTL logic 49
TVS diode 69
twisted-pair cable 131 – 134
RS-232 and 68
TX 45
TXD 45
TXREG 231 , 238
TXSTA 231 – 233 , 236
Type 1 cable 133
.
UART
16550 263
chip 263
clock 15 – 16
defined 4 – 5
errors 217 – 218
external 263 – 265
firmware-only 263
responsibilities 14
USB bridge chip 325
See also PIC18F4520
UDP 37
UnauthorizedAccessException 159
unbalanced interfaces 58 – 59
Unicode 19 – 22
.NET and 173 – 176
union functional descriptor 349 , 352
unit load 86 – 87
Universal Asynchronous
Transmitter/Receiver. See UART
Universal Serial Bus. See USB
USART 14
See also UART
USB
ACK 322 , 323
bulk transfers 321 , 324
bus speed 320
composite device 356 – 362
configuration, USB 318
control transfer 321 , 324
converting to RS-232 332 – 334
data packet 322
Data stage 321
data toggle 323
descriptors, abstract control model 346 –
356
descriptors, composite CDC 360 – 361
device 317 , 319
endpoint 320
enumeration 318
handshake packet 322