2024年3月13日发(作者：刚水瑶)
1、外文原文
A: Fundamentals of Single-chip Microcomputer
The single-chipmicrocomputeristheculminationofboth
the development of the digital computer and the integrated
circuit arguablythe towmostsignificantinventionsofthe20th
century [1].
These tow types of architecture are found in single-chip
microcomputer. Some employ the split program/data memory of the
Harvard architecture, shown in Fig.3-5A-1, othersfollow the
philosophy, widely adapted for general-purpose computers and
microprocessors, of making no logical distinctionbetween
program and data memory as in the Princeton architecture, shown
in Fig.3-5A-2.
In general terms a single-chip microcomputer is
characterized by the incorporationof allthe units of a computer
into a single device, as shown inFig3-5A-3.
Program
memory
Input&
Output
CPU
unit
Data
memory
Fig.3-5A-1 A Harvard type
Input&
memory
CPU
Output
unit
Fig.3-5A-2. A conventional Princeton computer
External
Timing
components
System
clock
Timer/
Counter
Serial I/O
Reset
ROM
Prarallel
I/O
Interrupts
RAM
CPU
Power
Fig3-5A-3. Principal features of a microcomputer
Read only memory (ROM)
.ROM is usually for the permanent,
non-volatile storage of an applications program .Many
microcomputers and m are intended for high-volume applications
and hence the economical manufacture of the devices requires
thatthe contents ofthe programmemory be committed permanently
during the manufacture of chips .Clearly, this implies a
rigorous approach to ROM code development since changes cannot
be made after manufacture .This development process may involve
emulation using asophisticated development system with a
hardware emulation capability as well as the use of powerful
software tools.
Some manufacturers provide additional ROM options by
including in their range devices with (or intended for use with)
user programmablememory. The simplest of these is usually
device which can operate in a microprocessor mode by using some
of the input/output lines as an address and data bus for
accessing external memory. This type of device can behave
2
2024年3月13日发(作者：刚水瑶)
1、外文原文
A: Fundamentals of Single-chip Microcomputer
The single-chipmicrocomputeristheculminationofboth
the development of the digital computer and the integrated
circuit arguablythe towmostsignificantinventionsofthe20th
century [1].
These tow types of architecture are found in single-chip
microcomputer. Some employ the split program/data memory of the
Harvard architecture, shown in Fig.3-5A-1, othersfollow the
philosophy, widely adapted for general-purpose computers and
microprocessors, of making no logical distinctionbetween
program and data memory as in the Princeton architecture, shown
in Fig.3-5A-2.
In general terms a single-chip microcomputer is
characterized by the incorporationof allthe units of a computer
into a single device, as shown inFig3-5A-3.
Program
memory
Input&
Output
CPU
unit
Data
memory
Fig.3-5A-1 A Harvard type
Input&
memory
CPU
Output
unit
Fig.3-5A-2. A conventional Princeton computer
External
Timing
components
System
clock
Timer/
Counter
Serial I/O
Reset
ROM
Prarallel
I/O
Interrupts
RAM
CPU
Power
Fig3-5A-3. Principal features of a microcomputer
Read only memory (ROM)
.ROM is usually for the permanent,
non-volatile storage of an applications program .Many
microcomputers and m are intended for high-volume applications
and hence the economical manufacture of the devices requires
thatthe contents ofthe programmemory be committed permanently
during the manufacture of chips .Clearly, this implies a
rigorous approach to ROM code development since changes cannot
be made after manufacture .This development process may involve
emulation using asophisticated development system with a
hardware emulation capability as well as the use of powerful
software tools.
Some manufacturers provide additional ROM options by
including in their range devices with (or intended for use with)
user programmablememory. The simplest of these is usually
device which can operate in a microprocessor mode by using some
of the input/output lines as an address and data bus for
accessing external memory. This type of device can behave
2