Texas Instruments MSP430x1xx User Manual page 39

Figure 3−1. CPU Block Diagram
MDB − Memory Data Bus
16
Memory Address Bus − MAB
15
R0/PC Program Counter
R1/SP Stack Pointer
R2/SR/CG1 Status
R3/CG2 Constant Generator
R4 General Purpose
R5 General Purpose
R6 General Purpose
R7 General Purpose
R8 General Purpose
R9 General Purpose
R10 General Purpose
R11 General Purpose
R12 General Purpose
R13 General Purpose
R14 General Purpose
R15 General Purpose
Zero, Z
dst
Carry, C
16−bit ALU
Overflow, V
Negative, N
CPU Introduction
0
0
0
16
src
MCLK
RISC 16-Bit CPU 3-3