7/27/2019 MicroC2ECH01L02CPUMCU

1/18

Chapter 1

Types, Selection, andApplications of

Microcontrollers

7/27/2019 MicroC2ECH01L02CPUMCU

2/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 2

Lesson 2

CPU, Microcomputer and

Microcontroller

7/27/2019 MicroC2ECH01L02CPUMCU

3/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 3

Instruction Execution Section

CPUCPU

Program-flow control Section

Arithmetic

and LogicUnit

Fetch Unit

Control unit

Internal Buses

+,-,,

XOR, OR,AND,NOT

Rotate

Shift

7/27/2019 MicroC2ECH01L02CPUMCU

4/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 4

CPU

Internal bus

Execution

IRID

FetchDecode

Control

and

Sequencer

Circuits

7/27/2019 MicroC2ECH01L02CPUMCU

5/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 5

CPU and BusesCPU and Buses

Arithmeticand LogicUnit

Fetch Unit

Control

unitProgramCounter

IO DevicesMemory

ControlBus

AddressBus

DataBus

7/27/2019 MicroC2ECH01L02CPUMCU

6/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 6

MicroprocessorMicroprocessor

--

Chip or VLSI SectionChip or VLSI Section

Registers

Stack

CPUReset

circuit

Clock

circuit

Cache

7/27/2019 MicroC2ECH01L02CPUMCU

7/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 7

Microprocessor

Microcomputer Chip or VLSI CoreChip or VLSI Core

Interrupt

Handler

unit

MemoryTiming

Unit

IO DevicesControl

BusAddressBus

DataBus

7/27/2019 MicroC2ECH01L02CPUMCU

8/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 8

Microprocessor

Memory

Interrupt Handler unit

Timing Unit

Computer System

PortsMicro-computer

Peripherals

Hard Disk

CDdrive

Keyboard

7/27/2019 MicroC2ECH01L02CPUMCU

9/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 9

CPUMemory

Interrupt Handler unit

Timing Devices

Microcontroller Chip or VLSI Core

PortsMicro-computer

PWM

Watchdog Timer

Serial

Devices

ADCApplicationspecific Devices

7/27/2019 MicroC2ECH01L02CPUMCU

10/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 10

Embedded processorEmbedded processor

--

Chip or VLSI CoreChip or VLSI Core

Large register sets

CPUReset

circuit

Clock

circuit

Cache

Fast context switching

Registers based ALU

7/27/2019 MicroC2ECH01L02CPUMCU

11/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 11

Embedded MicrocontrollerEmbedded Microcontroller

7/27/2019 MicroC2ECH01L02CPUMCU

12/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 12

CPUMemory

Interrupt Handler unit

Timing Devices

No external memory or devices based

system

PortsMicro-computer

PWM

Watchdog Timer

Serial

Devices

ADC

Application

specific Devices

Embedded MicrocontrollerEmbedded Microcontroller

7/27/2019 MicroC2ECH01L02CPUMCU

13/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 13

External Memory ExpandedExternal Memory Expanded

MicrocontrollerMicrocontroller

7/27/2019 MicroC2ECH01L02CPUMCU

14/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 14

CPUMemory

Interrupt Handler unit

Timing Devices

External memory or devices based

system

PortsMicro-computer

External Ports

Internal

Devices

ExternalRAM/ROM

7/27/2019 MicroC2ECH01L02CPUMCU

15/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 15

Summary

7/27/2019 MicroC2ECH01L02CPUMCU

16/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 16

Microprocessor CPU withprogram flow control unit and

execution unit

We learntWe learnt

7/27/2019 MicroC2ECH01L02CPUMCU

17/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 17

Microcomputer AMicroprocessor with timing unit,interrupt handling unit and

memory

We learntWe learnt

7/27/2019 MicroC2ECH01L02CPUMCU

18/18

2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 18

Microcontrollers A CPU withon-chip Ports, Memory, Special

Function Registers, timers andother registers, serial interface,

ADC, PWM and application

specific devices

We learntWe learnt