General-Purpose Register
Program Counter
Stack Pointer
Status Register
Constant Generator
General-Purpose Register
General-Purpose Register
General-Purpose Register
PC/R0
SP/R1
SR/CG1/R2
CG2/R3
R4
R5
R12
R13
General-Purpose Register
General-Purpose Register
R6
R7
General-Purpose Register
General-Purpose Register
R8
R9
General-Purpose Register
General-Purpose Register
R10
R11
General-Purpose Register
General-Purpose Register
R14
R15
MSP430G2744, MSP430G2544, MSP430G2444
SLAS892C – MARCH 2013 – REVISED SEPTEMBER 2014
www.ti.com
6
Detailed Description
6.1
CPU
The MSP430™ CPU has a 16-bit RISC architecture that is highly transparent to the application. All
operations, other than program-flow instructions, are performed as register operations in conjunction with
seven addressing modes for source operand and four addressing modes for destination operand.
The CPU is integrated with 16 registers that provide reduced instruction execution time. The register-to-
register operation execution time is one cycle of the CPU clock.
Four of the registers, R0 to R3, are dedicated as program counter, stack pointer, status register, and
constant generator respectively. The remaining registers are general-purpose registers.
Peripherals are connected to the CPU using data, address, and control buses and can be handled with all
instructions.
38
Detailed Description
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