MSP 430 Architrcture

• It is a 16 bit RISC CPU. It has efficient ultra-low power CPU. It is C compiler friendly.
• RISC architecture has 27 core instructions, 24 emulated instructions, 11 addressing modes and constant generator.
• Single cycle register operations can be carried out.
• There is memory to memory atomic addressing.
• It supports bit, byte and word processing.

MSP 430 Clock System

The clock system is designed specifically for low battery powered applications.

There are three clock signals available-

• ACLK- auxiliary clock - It has low frequency. It is directly driven from common watch crystal. Software is selectable for individual peripherals.

• MCLK- master clock - It is used by CPU and high speed peripherals.

• SMCLK- sub mean clock - The software is selectable for individual peripherals.

  

MSP 430 Address space

• One Address space is shared with special function registers (SFRs), peripherals, RAM, flash/ ROM.
• The code is always accessed from even address.

• The data is accessed as bytes or word.