Zilog Z80380 Manuel d'utilisateur télécharger pdf (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.

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Zilog Z80380 Manuel d'utilisateur Page 112