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Apr 10, 2020 at 16:30 comment added Ron Beyer Not really the "area of material", a silicon die is made up of (standard in the manufacturer) logical blocks of functions, die manufacturers (like Microchip) take these "blocks" and place them around the chip in logical locations around a core logic block. The physical arrangement of these blocks dictates the physical pin layout. It's kind of like building a microchip with logical "lego" bricks. You choose the bricks, arrange them on the die, then connect the pins to make a microcontroller.
Apr 10, 2020 at 15:57 comment added Nguyễn Phúc Oh, so the arrangement of the pins and its function is based on the area of material on the pic??
Apr 10, 2020 at 15:44 comment added Ron Beyer @NguyễnPhúc The physical arrangement of the pins on the processor deals more with the arrangement of the actual silicon die and the functions that the wire-bonded "block" that it attaches to has.
Apr 10, 2020 at 15:17 comment added Spehro 'speff' Pefhany +1 If the power-on default configuration was ever important, it's no longer so since PICs with ANSEL registers default to analog inputs but the GPIO numbering is shown first (eg. RB5/AN13/T1G on the [PIC16F882](RB5/AN13/T1G). Probably more like a primary function/secondary function kind of thing.
Apr 10, 2020 at 15:09 vote accept Nguyễn Phúc
Apr 10, 2020 at 16:14
Apr 10, 2020 at 15:09 comment added Nguyễn Phúc Thank you. My teacher asked me this. He also asked for the logic of arranging the pin on the pic, i find so difficult to look up for this request...
Apr 10, 2020 at 14:59 history answered Ron Beyer CC BY-SA 4.0