參數(shù)資料
型號(hào): CTMRM
英文描述: Configurable Timer Module Reference Manual
中文描述: 配置定時(shí)器模塊參考手冊(cè)
文件頁數(shù): 151/164頁
文件大?。?/td> 1148K
代理商: CTMRM
CTM
REFERENCE
MOTOROLA
C-3
GLOSSARY
C
LSB
Least significant byte.
Master
The module that initiates a bus request and controls the bus transaction with a slave
module.
MCSM
Modulus counter submodule.
MCU
Microcontroller unit.
Module
A functional block compatible with the Motorola modular microcontroller family (MMF)
that connects to the IMB.
MSB
Most significant byte.
Negate
A negated signal is driven to its inactive or false state, irrespective of that state being
represented by a high or low voltage level.
Nibble
Half a byte; four bits.
NRZ
Non-return to zero.
Opcode
The opcode is a byte which identifies the particular instruction and operating mode to
the CPU. See also: prebyte, operand.
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
Output compare; a function provided by the timing system, whereby an external event
is generated when an internal counter value matches a predefined value.
PLCC
Plastic leaded chip carrier package.
PLL
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.
Prebyte
This byte is sometimes required to qualify an opcode, in order to fully specify a
particular instruction. See also: opcode, operand.
Pull-down, pull-up
These terms refer to resistors, sometimes internal to the device, which are
permanently connected to either ground or V
DD
.
PWM
Pulse width modulation; 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.
QFP
Quad flat pack package.
RAM
Random access memory. Fast read and write, but contents are lost when the power
is removed.
RFI
Radio frequency interference.
RTI
Real-time interrupt.
ROM
Read-only memory. This type of memory is programmed during device manufacture
and cannot subsequently be altered.
RS-232C
A standard serial communications protocol.
F
.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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