Chapter 1 Types, Selection, and Applications of Microcontrollers Lesson 2 CPU, Microcomputer and Microcontroller 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 2 CPU Program-flow control Section Fetch Unit Control unit Internal Buses Instruction Execution Section Arithmetic +,-,, Rotate and Logic XOR, OR, Unit Shift AND,NOT 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 3 Internal bus Fetch IR Decode ID Control Execution and Sequencer Circuits CPU 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 4 CPU and Buses Fetch Unit Memory IO Devices Control unitProgram Counter Arithmetic and Logic Control Data Unit Bus Bus Address Bus 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 5 Microprocessor - Chip or VLSI Section Cache Reset CPU circuit Registers Clock circuit Stack 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 6 Microcomputer Chip or VLSI Core Microprocessor Memory Interrupt Timing Unit Handler unit IO Devices Data Control Bus Bus Address Bus 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 7 Computer System Microprocessor Micro- Ports Memory computer CD Interrupt Handler unit drive Timing Unit Hard Disk Keyboard Peripherals 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 8 Microcontroller Chip or VLSI Core CPU Micro- Ports Memory computer Interrupt Handler unit Serial Devices Timing Devices Watchdog Timer Application specific Devices PWM ADC 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 9 Embedded processor - Chip or VLSI Core Cache Reset CPU circuit Large register sets Clock Fast context switching circuit Registers based ALU 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 10 Embedded Microcontroller 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 11 Embedded Microcontroller CPU Micro- Ports Memory computer Interrupt Handler unit Serial Devices Timing Devices Application Watchdog Timer specific Devices PWM ADC No external memory or devices based system 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 12 External Memory Expanded Microcontroller 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 13 CPU Micro- Ports Memory computer Interrupt Handler unit Internal Devices Timing Devices External memory or devices based system External Ports External RAM/ROM 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 14 Summary 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 15 We learnt • Microprocessor— CPU with program flow control unit and execution unit 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 16 We learnt • Microcomputer— A Microprocessor with timing unit, interrupt handling unit and memory 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 17 We learnt • Microcontrollers— A CPU with on-chip Ports, Memory, Special Function Registers, timers and other registers, serial interface, ADC, PWM and application specific devices 2011 Microcontrollers-... 2nd Ed. Raj Kamal Pearson Education 18 .