參數(shù)資料
型號: MC68HC05X4DW
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: HCMOS Microcontroller Unit
中文描述: 8-BIT, MROM, 2.2 MHz, MICROCONTROLLER, PDSO28
封裝: SOIC-28
文件頁數(shù): 144/156頁
文件大小: 926K
代理商: MC68HC05X4DW
Glossary
MC68HC0X4 Rev 1.0
144
Glossary
MOTOROLA
ROM
— Read-only memory. A type of memory that can be read but cannot be changed (written).
The contents of ROM must be specified before manufacturing the MCU.
SCI
— See "serial communication interface module (SCI)."
serial
— Pertaining to sequential transmission over a single line.
serial communications interface module (SCI)
— A module in the M68HC08 Family that
supports asynchronous communication.
serial peripheral interface module (SPI)
— A module in the M68HC08 Family that supports
synchronous communication.
set
— To change a bit from logic 0 to logic 1; opposite of clear.
shift register
— A chain of circuits that can retain the logic levels (logic 1 or logic 0) written to
them and that can shift the logic levels to the right or left through adjacent circuits in the
chain.
signed
— A binary number notation that accommodates both positive and negative numbers.
The most significant bit is used to indicate whether the number is positive or negative,
normally logic 0 for positive and logic 1 for negative. The other seven bits indicate the
magnitude of the number.
software
— Instructions and data that control the operation of a microcontroller.
software interrupt (SWI)
— An instruction that causes an interrupt and its associated vector
fetch.
SPI
— See "serial peripheral interface module (SPI)."
stack
— A portion of RAM reserved for storage of CPU register contents and subroutine return
addresses.
stack pointer (SP)
— A 16-bit register in the CPU08 containing the address of the next available
storage location on the stack.
start bit
— A bit that signals the beginning of an asynchronous serial transmission.
status bit
— A register bit that indicates the condition of a device.
stop bit
— A bit that signals the end of an asynchronous serial transmission.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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