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Mechatronics unit 2 and 3

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This document discusses microprocessors and microcontrollers. It covers the 8085 microprocessor and 8051 microcontroller. It includes block diagrams and descriptions of the internal architecture and pin configurations of both chips. It also provides the timing diagram of the 8085 microprocessor machine cycles and discusses the 8255 Programmable Peripheral Interface chip including its pin configuration and block diagram. Examples are given of interfacing a keyboard, seven segment display, temperature sensor, and stepper motor with microcontrollers.

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ME 6702 – MECHATRONICS Prepared by, L.Loganathan,AP/Mech, Kamaraj college of Engg and Tech.
UNIT-II MICROPROCESSOR(8051) & MICROCONTROLLER (8051)
IMPORTANT QUESTIONS • Draw the internal block of 8085 microprocessor & explain each block. • Explain the pin configuration of 8085 microprocessor. • Explain addressing modes and its types. • Explain the timing diagram of 8085 microprocessor with machine cycle • Explain the architecture of 8051 microcontroller with block diagram. • Explain the pin configuration of 8051 microcontroller.
Pin configuration of 8085 microprocessor a) Power supply b) Frequency signals c) Data bus d) Address bus e) Control bus f) Interrupt signal g) Serial I/O signal h) DMA signal i) Reset Signal
Architecture of 8085 microprocessor
TIMING DIAGRAM S.No Machine Cycle Status Control IO/m S 1 S 2 R D W R INTA 1 Opcode fetch 0 1 1 0 1 1 Memory read 0 1 0 0 1 1 3 Memory write 0 0 1 1 0 1 4 I/O read 1 1 0 0 1 1 5 I/O write 1 0 1 1 0 1 6 InterruptACK 1 1 1 1 1 0 7 Bus idle 1 1 1 1 1 1 Machine Cycle 1 Opcode fetch 2 Memory read 3 Memory write 4 I/O read 5 I/O write 6 InterruptACK 7 Bus idle
TIMING DIAGRAM S.No Machine Cycle Status Control IO/m S1 S2 RD WR INTA 1 Opcode fetch 0 1 1 0 1 1
TIMING DIAGRAM S.No Machine Cycle Status Control IO/m S1 S2 RD WR INTA 2 Memory read 0 1 0 0 1 1
TIMING DIAGRAM S.No Machine Cycle Status Control IO/m S1 S2 RD WR INTA 3 Memory write 0 0 1 1 0 1
TIMING DIAGRAM S.No Machine Cycle Status Control IO/m S1 S2 RD WR INTA 4 I/O read 1 1 0 0 1 1
TIMING DIAGRAM S.No Machine Cycle Status Control IO/m S1 S2 RD WR INTA 5 I/O write 1 0 1 1 0 1
Pin configuration of 8051 microcontroller a) Power supply b) Port 0 (P0.0 to P0.7) c) Port 1(P1.0 to P1.7) d) Port 2 (P2.0 to P2.7) e) Port 3 (P3.0 to P3.7) f) ALE/Prog g) XTAL1 & XTAL2 h) PSEN i) EA/VPP j) RST
Architecture of 8051 microcontroller
Mechatronics unit 2 and 3
PROGRAMMABLE UNIT-III PERIPHERAL INTERFACE
Pin configuration of 8255 PPI a) Power supply b) Port A (PA0 to PA7) c) Port B(PB0 to PB7) d) Port C(PC0 to PC7) e) Data bus buffer f) Read g) A1,A0 h) Write i) Chip select j) RST
Block Diagram of 8255 PPI
W O R K I N G
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Interfacing a keyboard & a seven segment display
Truth Table of seven segment display
Interfacing a Temperature sensor with 8051
Interfacing a Stepper motor with 8051 X1 X2 Y1 Y2
Mechatronics unit 2 and 3

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Mechatronics unit 2 and 3