參數(shù)資料
型號： MC68HC05X4
廠商： Motorola, Inc.
英文描述： HCMOS Microcontroller Unit
中文描述： HCMOS微控制器
文件頁數(shù)： 139/156頁
文件大小： 926K
代理商： MC68HC05X4
Glossary
MC68HC0X4 Rev 1.0
MOTOROLA
Glossary
139
external interrupt module (IRQ)
— A module in the M68HC08 Family with both dedicated
external interrupt pins and port pins that can be enabled as interrupt pins.
fetch
— To copy data from a memory location into the accumulator.
firmware
— Instructions and data programmed into nonvolatile memory.
free-running counter
— A device that counts from zero to a predetermined number, then rolls
over to zero and begins counting again.
full-duplex transmission
— Communication on a channel in which data can be sent and
received simultaneously.
H
— The upper byte of the 16-bit index register (H:X) in the CPU08.
H
— The half-carry bit in the condition code register of the CPU08. This bit indicates a carry from
the low-order four bits of the accumulator value to the high-order four bits. The half-carry
bit is required for binary-coded decimal arithmetic operations. The decimal adjust
accumulator (DAA) instruction uses the state of the H and C bits to determine the
appropriate correction factor.
hexadecimal
— Base 16 numbering system that uses the digits 0 through 9 and the letters A
through F.
high byte
— The most significant eight bits of a word.
illegal address
— An address not within the memory map
illegal opcode
— A nonexistent opcode.
I
— The interrupt mask bit in the condition code register of the CPU08. When I is set, all interrupts
are disabled.
index register (H:X)
— A 16-bit register in the CPU08. The upper byte of H:X is called H. The
lower byte is called X. In the indexed addressing modes, the CPU uses the contents of
H:X to determine the effective address of the operand. H:X can also serve as a temporary
data storage location.
input/output (I/O)
— Input/output interfaces between a computer system and the external world.
A CPU reads an input to sense the level of an external signal and writes to an output to
change the level on an external signal.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相關代理商/技術參數(shù)
參數(shù)描述
MC68HC05X4CDW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05X4DW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC08AB16A 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC08AB16AD 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC08AZ0 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Advance Information
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