arm v7 registers: BONGDATV

3.1 Registers. The ARM architecture provides sixteen 32-bit general purpose registers (R0-R15) for software use. Fifteen of them (R0-R14) can be used for general purpose data storage, while R15 is the program counter whose value is altered as the core executes instructions.

ARM Registers. The amount of registers depends on the ARM version. According to the ARM Reference Manual, there are 30 general-purpose 32-bit registers, with the exception of ARMv6-M and ARMv7-M based processors.

Appendix I Register Index. I.1 ARM core registers ..... AppxI-2 I.2 Memory mapped system registers ..... AppxI-3 I.3 Memory mapped debug registers ..... AppxI-5. Glossary

ARM core registers describes the application level view of the ARM register file. This view provides 16 ARM core registers, R0 to R15, that include the Stack Pointer (SP), Link Register (LR), and Program Counter (PC).