Inside the
Hitachi SH-DSP and SH3-DSP
A BDTI Technical Evaluation
The first independent, in-depth report to evaluate the Hitachi SH-DSP and SH3-DSP,
hybrid 16-bit fixed-point DSP/32-bit microcontroller architectures from Hitachi. This report provides
a comprehensive qualitative analysis
of the processors' architecture and features, along with a complete quantitative
analysis based on results from BDTI's DSP benchmark suite. The performance of the SH-DSP and SH3-DSP
is compared to that of key competitors, with benchmark results analyzed
in terms of underlying architectural strengths and weaknesses.
Like all of the reports in the Inside series, Inside the Hitachi SH-DSP and SH3-DSP:
- Is based on hands-on programming experience
- Includes industry-standard BDTI Benchmark™ results
- Identifies processor strengths and weaknesses
- Compares performance to that of key competitors
- Provides timely information from the established leader in DSP technology
analysis
Report includes analysis of the SH-DSP and SH3-DSP's:
- Architecture
- Data path
- Memory system
- Instruction set
- Address generation
- Execution control
- On-chip debugging support
- Benchmark performance
- Fabrication details
- Development tools
- Applications support
- Advantages
- Disadvantages
Table of Contents
- Introduction
- About the authors
- Qualitative analysis of the SH-DSP and SH3-DSP
- Overview of competitors
- Motorola DSP563xx
- Motorola DSP5685x
- Texas Instruments TMS320C54xx
- Texas Instruments TMS320C55xx
- Agere DSP16xxx
- Analog Devices ADSP-219x
- Analysis and comparison of benchmark results
- Conclusions
- Appendix: contains complete BDTI Benchmark results for the SH-DSP, SH3-DSP, and competitors
Excerpts from BDTI's analysis:
The SH-DSP's compatibility with the SH-2 provides a natural migration path for SH-2 customers
who are adopting DSP-intensive designs. Of course, there is a price for this compatibility—while the
SH-DSP is a single processor, it has two personalities: two instruction sets, two data paths, two sets of registers, and so on.
Overall, the SH-DSP and SH3-DSP are reasonably competitive with conventional 16-bit DSPs in terms of speed,
but not in terms of energy efficiency.
Sample benchmark results
BDTI's Real Block FIR Filter Benchmark - Execution Time in microseconds
(lower is faster)
BDTI's Inside Series
Inside the Hitachi SH-DSP and SH3-DSP is one of many in-depth reports in BDTI's series of focused
technical analyses of single processors. The series also includes:
The BDTI Benchmarks™
The analysis in Inside the Hitachi SH-DSP and SH3-DSP is based on the results
of the BDTI Benchmarks, an industry-standard suite of DSP algorithm kernels.
Each benchmark is painstakingly written and optimized in native assembly
language following a strict specification.
Pricing, Shipping, and Ordering Information
First copy: $1,500
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To order Inside the Hitachi SH-DSP and SH3-DSP, download an order form in HTML or PDF, complete and return it to BDTI by mail or fax.
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