This section describes various instruction functions of RX family.

The RX CPU has short formats for frequently used instructions, facilitating the development of efficient programs that take up less memory. Moreover, some instructions are executable in one clock cycle, and this realizes high-speed arithmetic processing.

The RX CPU has a total of 90 instructions, consisting of 73 basic instructions, eight floating-point operation instructions, and nine DSP instructions.

While the RX600 Series supports all of the instructions, the RX200 Series supports the 82 instructions other than the eight for floating-point operations.

The RX CPU has 10 addressing modes, with register-register operations, register-memory operations, and bitwise operations included. Data transfer between memory locations is also possible. An internal multiplier is included for high-speed multiplication.