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12 Appendix B: Instruction Set Overview
12 Appendix B: Instruction Set Overview
12.1 Introduction
The instruction set of the SX20/28/48/52 microcontrollers consists of 43 single-word basic instructions
that are executed in one clock cycle, with the exception of JMP, CALL, and failed test instructions, like
DECSZ, INCSZ, SB and SNB.
In addition to the 43 basic instructions, the SX-Key assembler allows for additional instruction
mnemonics that are either converted internally into other basic instructions, or are expanded into two
or more basic instructions.
12.2 Instruction Set Summary
Table 22 – SX Instruction Mnemonics below, contains a list of all instruction mnemonics supported by
the assembler:
SX-Key/Blitz Development System Manual 2.0 • Parallax, Inc. • Page 111