Texas Instruments C28 Series Student Guide

Numbering System Basics
To load small two's complement numbers into larger
registers:
The MSB of the original number must carry to the MSB of the number when represented in the
larger register.
1. Load the small number “right justified” into the larger register.
2. Copy the sign bit (the MSB) of the original number to all unfilled bits to the left in the
register (sign extension).
Consider our two previous values, copied into an 8-bit register:
Examples:
Original No. 0 1 1 0
2
= 6
10
1 1 1 1 0
2
= -2
10
1. Load low 0 1 1 0 1 1 1 1 0
2. Sign Extend 0 0 0 0 0 1 1 0 = 4 + 2 = 6 1 1 1 1 1 1 1 0 = -128 + 64 + ... + 2 = -2
8 - 4 C28x - Numerical Concepts & IQmath

Texas Instruments C28 Series Specifications

General

Brand	Texas Instruments
Model	C28 Series
Category	Computer Hardware
Language	English