Texas Instruments TMS320C80, Руководство пользователя

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Overview of ’C80 and ’C82 Features
1-2 TMS320C80 to TMS320C82 Software Compatibility User’s Guide
1.1 Overview of ’C80 and ’C82 Features
The ’C80 offers processing power equivalent to up to 2 billion
RISC operations/second. The ’C82 is a low-cost implementation
of the ’C8x architecture that provides high levels of processing
power for cost-sensitive applications.
The ’C80 and the ’C82 are very similar in design. They have sev-
eral features in common, including a crossbar network, parallel
processors, a master processor, a transfer controller, and on-
chip RAM. The processors are binary compatible and can run
each other’s software if the software is written for compatibility.
Four main differences relate to compatibility:
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The ’C80 has four parallel processors; the ’C82 has two.
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The on-chip RAM of the ’C80 is divided into 25 2-KB blocks;
the on-chip RAM of the ’C82 is divided into 11 4-KB blocks.
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The ’C80 transfer controller has 7 externally initiated packet
transfer (XPT) requests; the ’C82 transfer controller has 15.
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The ’C80 has an on-chip video controller; the ’C82 has none.
Table 1–1 compares the features of the ’C80 and the ’C82.
Table 1–1. ’C80 and ’C82 Features
Feature ’C80 ’C82
Number of PPs 4 2
On-chip video controllers 1 None
Total on-chip RAM 50 KB 44 KB
Local data RAM per PP 6 KB 8 KB
Parameter RAM per PP 2 KB 4 KB
PP instruction cache size 2 KB 4 KB
MP parameter RAM size 2 KB 4 KB
MP data cache size 4 KB 4 KB
MP instruction cache size 4 KB 4 KB