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You can read a half-word or byte by defining a variable of the appropriate size at the appropriate address (or via a pointer, which has the same effect). But why would you? Reading a byte or half-wor …

You have placed somethiung that you call the reset vector at a different location, but the chip doesn't care: its hardware still starts executing at 0 after a reset. So to implement what you want you' …

"What are some things that novices miss?" First check your hardware. Find a blink-a-led.hex file that is known to work and verify that your hardware works. (I have some on my website, Google is your …

You ask for "context saving", but you don't seem to know what that term means in your context? The meaning I am most familiar with is in the context of interrupts and task switching, where everything …

Your SPI-without-select is what Microchip uses on their MCP23017 chips (and others). Nothing wrong with that approach. Yes, what you want is possible, but you must get the slaves to be open-drain. Yo …

Beware that you are asking for opinions, which can be a reason for closing your question. You stated both "clock frequency as high as possible" and "not that expensive", without quantifying either. T …

An AtMega is likely to be programmed in C or C++, not C#. In most cases the vendor of a product will enable 'read-protection' on such a chip, exactly to prevent what you are trying to do. If he forgo …

Nearly all current micro-controllers can do the basic things you would want to do with a micro-controller, but each requires some startup effort to get 'up and running'. A few possible choices: Ar …

I wrote a number of microcontroller GPIO libraries (essentially set pin direction, set pin, read pin, read pin as analog input). …

. ========================================= Now some homework as a preparation for the next interview: You have a USB powered 5V gadet, that has a microcontroller and an LM35 temperature sensor. …

With 5 LEDs, 1 button, and 2 pins for power this is a perfect match for an 8-pin micro-controller. The hobby-friendly DIP-8 package would easily fit in your bike light, but the manufacturer probably u …

I think any of your suggestions can be made to work. A small microswitch would be my first choice (I have a box of tiny ones that take almost no force to close). But that is mechanical so it will …

An arduino is not a plain micro-controller, so you are making a strange comparision here. An arduino Uno has a pre-installed bootloader in the Atmel ATmega328 micro-controller, plus an USB-to-serial i …

As always, it depends. If you have a project with specific requirements and a uC that meets those requirements there is no need to know the capabilities of the uC you are not using. There might be an …

This is equivalent to deriving the 5V from a much higher voltage, and the same problems apply. For the power, any fault in the voltage-reduction circuitry can destroy the uC. For the logic, it must be …