Texas Instruments C2000 Workshop Guide And Lab Manual

Binary Fractions
8 - 10 C2000 Microcontroller Workshop - Numerical Concepts
As with integers, the results are loaded low and the MSB is a sign extension of the seventh bit. If
this value were loaded into the accumulator, we could store the results back to memory in a
variety of ways:
• Store both low and high accumulator values back to memory. This offers maximum
detail, but has the same problems as with integer multiply.
• Store only the high (or low) accumulator back to memory. This creates a potential for
a memory littered with varying Q-types.
• Store the upper accumulator shifted to the left by 1. This would store values back to
memory in the same Q format as the input values, and with equal precision to the
inputs. How shall the left shift be performed? Here’s three methods:
− Explicit shift (C or assembly code)
− Shift on store (assembly code)
− Use Product Mode shifter (assembly code)

Texas Instruments C2000 Specifications

General

Brand	Texas Instruments
Model	C2000
Category	Microcontrollers
Language	English