SH-4
The SH-4 was developed for primary use in multimedia applications, such as Sega's Dreamcast and NAOMI game systems. It includes a much more powerful floating point unit and additional built-in functions, along with the standard 32-bit integer processing and 16-bit instruction size.
SH-4 features include:
- FPU with four floating point multipliers, supporting 32-bit single precision and 64-bit double precision floats
- 128-bit floating point bus allowing 3.2GB/sec transfer rate from the data cache
- 64-bit external data bus with 32-bit memory addressing, allowing a maximum of 4GB addressable memory with a transfer rate of 800MB/sec
- Built-in interrupt, DMA, and power management controllers
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