Portable Electronics
Portable Electronics
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US $.93
How do digital electronics work?
I am wondering how electronics work. Specifically portable, digital electronics with graphical user interfaces like cell phones, iPods, PSP's and other devices.
How is the interface created for the device?
When you press a button or key, how does it know what to do? For example, when you press a button on a cell phone, how does it know what letter or number to show on the screen, especially when the functions of buttons change for different applications?
Please be very detailed.
These devices are based around a microcontroller or microprocessor whose job it is to monitor the inputs and outputs via a program or operating system to determine the proper sequence of events to perform.
More detail would be taking it down to 0 and 1 where a each state represents an action for the microprocessor to perform, Pressing a number on a keypad looks as a certain byte pattern (1's and 0's) to the processor, which is always scanning it's input for changes, if you press a number if takes the new input and converts it to the appropriate output for display. This is a very generic breakdown...