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Comments on How come the registers in a micro are application specific?

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How come the registers in a micro are application specific?

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Register list This is an energy meter reference design guide I found in microchip's website. In a microcontroller how come the registers are specific to the project?Please explain.

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Calling those "registers" might be technically correct, but rather misleading in my opinion. These are really RAM locations. Probably for historical reasons, Microchip refers to RAM bytes in some of its microcontrollers as "registers" sometimes.

Change "Complete Register List" to "Complete Variables List", and "Register Name" to "Variable Name", and I think the confusion disappears. It should also be obvious in another way that these are not registers with specific hardware meaning, because those are all in bank 15. Since the addresses are explicitly given, we can see these variables are all in Bank 0.

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Lundin‭ wrote about 4 years ago

Typically there is an actual register hidden beneath the addressable RAM location though, and hardware handles transitions between them. Like for example SPI will have an actual hardware shift register underneath the memory location called SPIDR.

Olin Lathrop‭ wrote about 4 years ago

@Lundin: Right, but as I said, those are all in bank 15.