參數(shù)資料
型號(hào): MC68HC08MR4
廠商: Motorola, Inc.
英文描述: In-Circuit Simulator
中文描述: 在電路模擬器
文件頁(yè)數(shù): 92/100頁(yè)
文件大?。?/td> 506K
代理商: MC68HC08MR4
User
s Manual
M68ICS08MR In-Circuit Simulator
92
Glossary
MOTOROLA
Glossary
MR32
MCU MC68HC908MR32.
MSB
Most significant bit.
N
Abbreviation for negative, a bit in the condition code register of the
HC08. In two
s-complement computer notation, positive signed
numbers have a 0 in their MSB (most significant bit) and negative
numbers have a 1 in their MSB. The N condition code bit reflects the
sign of the result of an operation. After a load accumulator instruction,
the N bit will be set if the MSB of the loaded value was a 1.
object code file
A text file containing numbers that represent the binary
opcodes and data of a computer program. An object code file can be
used to load binary information into a computer system. Motorola uses
the S-record file format for object code files.
operand
An input value to a logical or mathematical operation.
opcode
A binary code that instructs the CPU to do a specific operation in a
specific way. The HC08 CPU recognizes 210 unique 8-bit opcodes that
represent addressing mode variations of 62 basic instructions.
OTPROM
A non-volatile type of memory that can be programmed but
cannot be erased. An OTPROM is an EPROM MCU that is packaged in
an opaque plastic package. It is called a one-time-programmable MCU
because there is no way to expose the EPROM to a UV light.
PC
Abbreviation for program counter CPU register of the HC08.
PCBA
Printed circuit board assembly.
PLL
Phase-locked loop.
program counter
The CPU register that holds the address of the next
instruction or operand that the CPU will use.
QFP
Quad flat pack.
RAM
Random access memory. Any RAM location can be read or written
by the CPU. The contents of a RAM memory location remain valid
until the CPU writes a different value or until power is turned off.
registers
Memory locations that are wired directly into the CPU logic
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