Zilog EZ80F916 - Manual (Page 401)

eZ80
®
CPU
User Manual
UM007715-0415 Glossary
392
SLP.
Sleep; a processor control instruction.
SMR.
Stop-Mode Recovery.
SP.
Stack Pointer.
SPH.
Stack Pointer High.
SPL.
Stack Pointer Low. The 24-bit Stack Pointer Long register.
SPS.
The 16-bit Stack Pointer Short register.
SR.
Shift Right.
SRA.
Shift Right Arithmetic; a shift instruction.
SRL.
Shift Right Logical; a shift instruction.
STMIX.
Set Mixed-ADL mode flag; a processor control instruction.
SUB.
Subtract without Carry; an arithmetic instruction.
T A .
Ambient Temperature.
TpC.
External Clock Cycle.
tristate.
A form of transistor-to-transistor logic in which output stages, or input and output stages, can
assume three states. Two are normal low-impedance 1 and 0 states; the third is a high-impedance state that
allows many tristate devices to time-share bus lines. This industry term is not trademarked, and is available
for Zilog use. Do not use 3-state or three-state.
TST.
Test Accumulator; a logical instruction.
TSTIO.
Test I/O; an input/output instruction.
TX.
Abbreviation for transmitter, transmit.
UART.
Universal Asynchronous Receiver/Transmitter—a component or functional block that manages
asynchronous communications. A UART converts data from the parallel format in which it is stored to a
serial format for transmission.
upconverter.
A device that translates frequencies from lower to higher frequencies.
USART.
Universal Synchronous/Asynchronous Receiver/Transmitter. Can manage synchronous and
asynchronous transmissions.
VBO.
Voltage Brown-Out.
V CC .
Supply voltage.
V PP .
Programmed Voltage.
V REF .
Analog reference voltage.
WAIT state.
A clock cycle during which no instructions are executed because the processor is waiting for
data from memory.
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 older manuals refer to this timer as the WDTMR.
WDTOUT.
Watch-Dog Timer output.
X IN .
Crystal Input.
XOR.
Logical Exclusive OR; a logical instruction.