ADSP-2111BS-80

Digital Signal Processor Dsp Overview

The ADSP-2111BS-80 is a 16-bit fixed-point DSP microprocessor from the Analog Devices ADSP-21xx family, distributed by Rochester Electronics. It operates at a maximum clock frequency of 8 MHz with a corresponding instruction cycle time of 125 ns. The device features an enhanced Harvard architecture supporting three-bus performance through separate program and data buses. Key specifications include 2K words of on-chip program memory RAM and 1K words of data memory RAM. It integrates two synchronous serial ports (SPORTs), a programmable interval timer, and a dedicated 16-bit Host Interface Port (HIP) for direct communication with host processors.

Digital Signal Processor Dsp Feature Summary

• Integrated 16-bit Host Interface Port (HIP) enabling direct parallel interface to host microprocessors like the 68000 or 80C51.
• Dual Data Address Generators (DAGs) supporting modulo and bit-reverse addressing for efficient circular buffering.
• Three independent computational units: ALU, Multiplier/Accumulator (MAC), and Shifter, all executing in single cycles.
• Zero-overhead looping capability via internal loop counters and loop stacks.

Digital Signal Processor Dsp Applications

• Systems requiring direct interfacing between a DSP core and a standard 8-bit or 16-bit host microcontroller.
• Digital signal processing tasks involving audio or telecommunications where hardware companding (A-law/μ-law) is required.
• Real-time control applications utilizing the integrated programmable interval timer for periodic interrupt generation.

Digital Signal Processor Dsp Procurement Notes

Verify the specific speed grade suffix 'S' corresponds to the 8 MHz operational requirement. Confirm the package type matches the design constraints, as the ADSP-2111 is available in 100-pin PGA and PQFP packages. Ensure compatibility with the 5V supply voltage specified for this family member. Check for any lot traceability requirements if the application demands strict manufacturing date codes.

Digital Signal Processor Dsp Selection Notes

Select the ADSP-2111BS-80 when a host interface port is necessary to simplify system architecture compared to external bus expansion. Compare against the ADSP-2115 if the HIP is not needed but higher clock speeds (up to 25 MHz) are required. Consider the ADSP-2101 if only basic serial communication is needed without the overhead of the host port. Verify that the 2K word program memory capacity suffices for the target application firmware.

Digital Signal Processor Dsp Part Context

Rochester Electronics provides sustainment services for legacy semiconductor products, including the ADSP-21xx family originally manufactured by Analog Devices. This component represents a continuation of production for devices that may otherwise be considered obsolete. The ADSP-2111 variant is distinct within the family due to its inclusion of the Host Interface Port, differentiating it from the ADSP-2101, 2103, 2105, and 2115 models which lack this specific peripheral.

Digital Signal Processor Dsp Replacement Considerations

Direct functional replacements within the same speed grade and package are limited due to the specific HIP integration. The ADSP-2111B (Industrial Temp) or ADSP-2111K (Commercial Temp) may serve as substitutes if temperature ranges align. Higher speed variants like the ADSP-2111L or ADSP-2111M operate faster but are pin-compatible. No cross-family digital replacements are officially documented in the provided source material.