Node: MSP430-Regs, Next: MSP430-Ext, Previous: MSP430-Chars, Up: MSP430 Syntax

### Register Names

General-purpose registers are represented by predefined symbols of the form `r` N`` (for global registers), where N represents a number between `0` and `15`. The leading letters may be in either upper or lower case; for example, `r13` and `R7` are both valid register names.

Register names `PC`, `SP` and `SR` cannot be used as register names and will be treated as variables. Use `r0`, `r1`, and `r2` instead.