XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 573

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

toggle — To change the state of an output from a logic 0 to a logic 1 or from a logic 1 to a logic 0.
tracking mode — Mode of low-jitter PLL operation during which the PLL is locked on a
two’s complement — A means of performing binary subtraction using addition techniques. The
unbuffered — Utilizes only one register for data; new data overwrites current data.
unimplemented memory location — A memory location that is not used. Writing to an
V —The overflow bit in the condition code register of the CPU08. The CPU08 sets the V bit when
variable — A value that changes during the course of program execution.
VCO — See "voltage-controlled oscillator."
vector — A memory location that contains the address of the beginning of a subroutine written
voltage-controlled oscillator (VCO) — A circuit that produces an oscillating output signal of a
waveform — A graphical representation in which the amplitude of a wave is plotted against time.
wired-OR — Connection of circuit outputs so that if any output is high, the connection point is
word — A set of two bytes (16 bits).
write — The transfer of a byte of data from the CPU to a memory location.
X — The lower byte of the index register (H:X) in the CPU08.
Z — The zero bit in the condition code register of the CPU08. The CPU08 sets the zero bit when
MC68HC908AZ60A — Rev 2.0
MOTOROLA
frequency. Also see "acquisition mode."
most significant bit of a two’s complement number indicates the sign of the number (1
indicates negative). The two’s complement negative of a number is obtained by inverting
each bit in the number and then adding 1 to the result.
unimplemented location has no effect. Reading an unimplemented location returns an
unpredictable value. Executing an opcode at an unimplemented location causes an illegal
address reset.
a two's complement overflow occurs. The signed branch instructions BGT, BGE, BLE,
and BLT use the overflow bit.
to service an interrupt or reset.
frequency that is controlled by a dc voltage applied to a control input.
high.
an arithmetic operation, logical operation, or data manipulation produces a result of $00.
Glossary
Technical Data
Glossary
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