Zilog Z80380 User Manual
Page 112
Glossary
Glossary-10
UM004001-COR1103
USART
Universal Synchronous/Asynchronous
Receiver/Transmitter. Can handle synchronous as well
as asynchronous transmissions.
USB
Universal Serial Bus.
USC
Universal Serial Controller.
UTB
Use Test Box. A board or system to test a particular
chip in an end-use application.
V
Volt, Overflow Flag.
WDT
Watch-Dog Timer. A timer that, when enabled under
normal operating conditions, must be reset within the
time period set within the application (WDTMR (1,0)). If
the timer is not reset, a Power-on Reset occurs. Some
earlier manuals refer to this timer as the WDTMR.
WDTOUT
Watch-Dog Timer Output.
Word
Amount of data a processor can hold in its registers
and process at one time. A DSP word is often 16 bits.
Given the same clock rate, a 16-bit controller
processes four bytes in the same time it takes an 8-bit
controller to process two.
WR
Write.
WS
Wafer Sort.
X
Indexed Address, Undefined.
XOR
Bitwise Exclusive OR.
XTAL
Crystal.
Z
Zero, Zero Flag.