MC68HC11PH8 Datasheet, PDF (250/264 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit

HCMOS
I/O
Input capture
Interrupt
IRQ
K byte
LCD
LSB
M68HC11
MCU
MI BUS
MSB
Nibble
NRZ
Opcode
Operand
Output compare
PLCC
PLL
Prebyte
Pull-down, pull-up
PWM
QFP
High-density complementary metal oxide semiconductor. A semiconductor
technology chosen for its low power consumption and good noise immunity.
Input/output; used to describe a bidirectional pin or function.
(IC) This is a function provided by the timing system, whereby an external event is
‘captured’ by storing the value of a counter at the instant the event is detected.
This refers to an asynchronous external event and the handling of it by the MCU. The
external event is detected by the MCU and causes a predetermined action to occur.
Interrupt request. The overline indicates that this is an active-low signal format.
A kilo-byte (of memory); 1024 bytes.
Liquid crystal display.
Least significant byte.
Motorola’s family of advanced 8-bit MCUs.
Microcontroller unit.
Motorola interconnect bus. A single wire, medium speed serial communications
protocol.
Most significant byte.
Half a byte; four bits.
Non-return to zero.
The opcode is a byte which identifies the particular instruction and operating mode to
the CPU. See also: prebyte, operand.
The operand is a byte containing information the CPU needs to execute a particular
instruction. There may be from 0 to 3 operands associated with an opcode. See also:
opcode, prebyte.
(OC) This is a function provided by the timing system, whereby an external event is
generated when an internal counter value matches a predefined value.
Plastic leaded chip carrier package.
Phase-locked loop circuit. This provides a method of frequency multiplication, to
enable the use of a low frequency crystal in a high frequency circuit.
This byte is sometimes required to qualify an opcode, in order to fully specify a
particular instruction. See also: opcode, operand.
These terms refer to resistors, sometimes internal to the device, which are
permanently connected to either ground or V_DD.
Pulse width modulation. This term is used to describe a technique where the width of
the high and low periods of a waveform is varied, usually to enable a representation
of an analog value.
Quad flat pack package.
MOTOROLA
ii
GLOSSARY
TPG
MC68HC11PH8