21061
ADSP-21061/ADSP-21061L Technical Summary
Overview
The ADSP-21061 and ADSP-21061L are high-performance digital signal processors (DSPs) from Analog Devices' SHARC® family. These processors are designed for demanding signal processing applications, offering a combination of high-speed computation, efficient memory management, and versatile peripheral interfaces. The ADSP-21061 operates at 5V, while the ADSP-21061L is a low-power 3.3V variant. Both devices feature a 32-bit floating-point architecture, making them ideal for applications requiring high precision and dynamic range.
The ADSP-21061/ADSP-21061L architecture includes computation units (ALU, multiplier, shifter), dual data address generators (DAGs), an on-chip 1Mbit SRAM, and multiple interfaces for external memory, host communication, and multiprocessing. The DSPs also support IEEE JTAG 1149.1 for testing and emulation.
Key Features
- Performance: 50 MIPS instruction rate with 20 ns cycle time, supporting single-cycle instruction execution.
- Floating-Point Capability: 120 MFLOPS peak performance, 80 MFLOPS sustained.
- Memory: 1 Mbit (128K x 32) of on-chip SRAM for high-speed data and program storage.
- Data Address Generators (DAGs): Dual DAGs with modulo and bit-reverse addressing for efficient FFT and DSP algorithm execution.
- Program Sequencing: Zero-overhead looping for efficient loop execution without pipeline stalls.
- External Port: Supports interfacing with off-chip memory and peripherals.
- Host Port & Multiprocessor Interface: Enables seamless integration in multiprocessor systems.
- DMA Controller: Supports high-speed data transfers without CPU intervention.
- Serial Ports: Two bidirectional serial ports for flexible communication.
- JTAG Test Access Port: IEEE 1149.1 compliant for boundary scan and emulation.
Applications
The ADSP-21061/ADSP-21061L is suitable for a wide range of signal processing applications, including:
- Audio and speech processing
- Radar and sonar systems
- Medical imaging and diagnostics
- Telecommunications (modems, base stations)
- Industrial control and automation
- Multiprocessor DSP systems
Electrical Characteristics
Recommended Operating Conditions (5V - ADSP-21061)
- Supply Voltage (VDD): 4.75V to 5.25V
- Input High Voltage (VIH): 2.0V min
- Input Low Voltage (VIL): 0.8V max
- Operating Temperature: -40°C to +85°C
Recommended Operating Conditions (3.3V - ADSP-21061L)
- Supply Voltage (VDD): 3.0V to 3.6V
- Input High Voltage (VIH): 2.0V min
- Input Low Voltage (VIL): 0.8V max
- Operating Temperature: -40°C to +85°C
Power Dissipation
- ADSP-21061 (5V): Typical 1.5W at 50 MHz
- ADSP-21061L (3.3V): Typical 0.8W at 50 MHz
Timing Specifications
The ADSP-21061/ADSP-21061L provides precise timing for memory access, DMA transfers, and serial communication. Key timing parameters include:
- Memory Read (Bus Master): 20 ns access time
- Memory Write (Bus Master): 20 ns cycle time
- DMA Handshake: Programmable wait states for flexible peripheral interfacing
- Serial Ports: Configurable clock and frame sync timing
Package Information
The ADSP-21061/ADSP-21061L is available in a 240-lead Metric Plastic Quad Flat Pack (PQFP). Key package details include:
- Package Dimensions: 32 mm x 32 mm body size
- Pin Pitch: 0.5 mm
- Thermal Resistance: 35°C/W (junction-to-case)
Development Tools
Analog Devices provides a comprehensive suite of development tools for the ADSP-21061/ADSP-21061L, including:
- EZ-ICE® Emulator: Real-time debugging and code profiling
- VisualDSP++ IDE: Integrated development environment with C/C++ compiler
- JTAG Interface: Boundary scan and in-circuit emulation support
Conclusion
The ADSP-21061/ADSP-21061L is a high-performance DSP offering exceptional computational power, efficient memory management, and versatile peripheral interfaces. Its floating-point architecture, multiprocessor support, and low-power variant (ADSP-21061L) make it suitable for a broad range of signal processing applications. With robust development tools and reliable packaging, the ADSP-21061/ADSP-21061L is an excellent choice for engineers designing advanced DSP systems.
