MICROPROCESSOR AND MICROCONTROLLER

Detailed explanation-1: -The ARM Register File. To perform operations on data, there needs to be a place to temporarily store that data. This is what a processor’s register file is for. The register file is a bank of registers that are used to store temporary values and perform actions on those values.

Detailed explanation-2: -The ARMv7 architecture uses general-purpose register R14 as the link register, OpenRISC uses register r9, and SPARC uses “output register 7” or o7. Some architectures have two link registers: a standard “branch link register” for most subroutine calls, and a special “interrupt link register” for interrupts.

Detailed explanation-3: -It has 37 registers, 1 is a dedicated program counter, 1 is a current program status register, 5 saved program status registers, and 30 are general-purpose registers, and has seven basic operating modes they are user, FIQ, IRQ, supervisor, un-def, and system.

Detailed explanation-4: -∎ ARM has 37 registers all of which are 32-bits long.