July 2011
Intermediate to advanced
888 pages
27h 36m
English
book
Microcontrollers: Architecture, Programming, Interfacing and System Design, 2nd Edition
by Raj Kamal
Content preview from Microcontrollers: Architecture, Programming, Interfacing and System Design, 2nd Edition
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8
Systems Design: Digital and Analog Interfacing Methods
Chapter Outline
- Study interfacing circuits of keys with the MCUs
- Learn interfacing circuits with physical devices as follows : LEDs, LCD, touch screen, printer, motors, coils, sensors, displacement and rotation encoders
- Know how an MCU drives the lOs at large voltages and currents.
- Know how an MCU is used in the robots, instruments and control systems using the appropriately designed interfaces for a system
8.1 INTERFACING OF THE KEY (SWITCH), KEYPAD AND KEYBOARD
8.1.1 A Single Key (switch) and Its Interface
A key (switch) switch interfaces with the port using two signals. One signal is called scan (strobe). Second is called return (sense). Scan and sense signals are between the key ...
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