Stereo System User Manual

MOTOROLA DSP96002 USER’S MANUAL 4 - 1
SECTION 4
SOFTWARE ARCHITECTURE
4.1 PROGRAMMING MODEL
The programmer can view the DSP96002 architecture as three execution units operating in parallel. The
three execution units are the
• Data ALU
• Address Generation Unit
• Program Controller
The DSP96002 instruction set has been designed to allow flexible control of these parallel processing re-
sources. Many instructions allow the programmer to keep each unit busy, thus enhancing program execu-
tion speed. The programming model is shown in Figure 4-1 and Figure 4-2, and is described in the following
sections.
Program Controller* - Reserved bits: always read as zero, should be written with zero for future compatibil-
ity.
Figure 4-1. DSP96002 Programming Model - Program Controller
PC MR ERIER CCR * OMR
LA LC
SP*
15
1
31 5 0
31 0
31 0
31 0 31 0
31 0
23 15
7
7
31 0 0 31
SYSTEM STACK
(SS)