TMS320C25FNL50

Digital Signal Processor Dsp Overview

The TMS320C25FNL50 is a second-generation CMOS digital signal processor from Texas Instruments, operating at an 80-ns instruction cycle time. It features a 32-bit ALU/accumulator and a single-cycle 16x16-bit multiplier producing a 32-bit product. The device includes 544 words of on-chip data RAM and 4K words of secure on-chip program ROM. It supports a 128K-word total address space with separate program, data, and I/O memory maps. Key architectural enhancements over the NMOS TMS32020 include eight auxiliary registers, bit-reversed indexed addressing for FFTs, and double-buffered serial port communication.

Digital Signal Processor Dsp Feature Summary

• 80-ns instruction cycle time using CMOS technology
• Single-cycle 16x16-bit hardware multiplier with 32-bit product register
• 4K words of on-chip secure program ROM and 544 words of data RAM
• Bit-reversed indexed addressing mode optimized for radix-2 FFT algorithms

Digital Signal Processor Dsp Applications

• Real-time digital signal processing requiring high throughput
• Adaptive filtering and extended-precision arithmetic operations
• Multiprocessing systems utilizing global data memory allocation
• Codec interfacing via the double-buffered serial port

Digital Signal Processor Dsp Procurement Notes

Verify the specific suffix 'FNL50' against current Texas Instruments documentation to confirm pinout compatibility and electrical specifications relative to the standard TMS320C25. Ensure that the commercial temperature range and 5-V supply requirements align with the target system design constraints before integration.

Digital Signal Processor Dsp Selection Notes

Select this component when an 80-ns cycle speed is required compared to the standard 100-ns TMS320C25. It maintains object-code compatibility with the TMS32020 while offering enhanced instruction sets. Consider the 68-pin PGA package availability and ensure sufficient off-chip memory interfaces are designed to support the 128K-word address space if internal storage is insufficient.

Digital Signal Processor Dsp Part Context

This device belongs to the TMS320C2x family, which bridges the first-generation TMS32010 and the floating-point TMS320C30. It represents the high-speed CMOS variant of the second generation, offering improved power efficiency and performance over the NMOS TMS32020 while maintaining software compatibility across the family.

Digital Signal Processor Dsp Replacement Considerations

The TMS320C25 (100-ns) is architecturally identical but slower. The TMS320E25 replaces the ROM with EPROM for development. No direct faster replacement exists within this specific datasheet; later generations like the TMS320C54x offer significant architectural changes.