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Analog Devices Inc. ADSP-2171BST-104
- Part No.:
- ADSP-2171BST-104
- Manufacturer:
- Analog Devices Inc.
- Category:
- DSP (Digital Signal Processors)
- Package:
- 128-LQFP
- Datasheet:
-
ADSP-2171BST-104.pdf
- Description:
- 16-BIT DIGITAL SIGNAL PROCESSOR
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADSP-2171BST-104 from Analog Devices is a 5.0 V, 30 ns instruction-cycle (33 MIPS) fixed-point DSP microcomputer with three computational units (ALU, MAC, shifter), 2K × 24-bit on-chip program RAM, 2K × 16-bit data RAM, dual serial ports (SPORT0/SPORT1), and an 8-/16-bit host interface port (HIP). It executes single-cycle instructions while concurrently handling serial I/O, timer decrement, and address generation - deployed in real-time audio codecs and telecom channel processing.
For engineers reviewing the ADSP-2171BST-104 datasheet, ADSP-2171BST-104 pinout, ADSP-2171BST-104 application, or ADSP-2171BST-104 equivalent, key selection criteria include its 128-pin TQFP package, 30 ns cycle time at 5.0 V, Bus Grant Hang Logic (BGH), powerdown mode (<0.55 mW standby), and ADSP-2100 family code compatibility with enhanced bit-manipulation and biased rounding instructions.
Technical Context
The ADSP-2171BST-104 implements the ADSP-2100 base architecture with parallel execution across ALU, MAC, and barrel shifter - each fed by dedicated internal buses (PMA, PMD, DMA, DMD, R). Its program sequencer enables zero-overhead looping and conditional execution in one cycle, while two independent DAGs support simultaneous dual-operand fetches with modulo addressing for circular buffers.
It integrates dual synchronous serial ports with hardware A-law/µ-law companding per CCITT G.711, programmable 16-bit interval timer with prescaler, and a fully asynchronous 16-pin HIP configurable for 8- or 16-bit host interfacing. Booting supports automatic loading from byte-wide EPROM or via HIP, with seven wait states on reset to accommodate 200 ns external memory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Instruction Cycle Time | 30 ns at 5.0 V - enables 33 MIPS sustained throughput with every instruction executing in one processor cycle. |
| On-Chip Program Memory | 2K × 24-bit RAM - stores both instructions and data, allowing dual-operand fetch per cycle (one from program, one from data memory). |
| On-Chip Data Memory | 2K × 16-bit RAM - supports simultaneous dual-operand access with independent DAG-controlled addressing. |
| Serial Ports | Two double-buffered SPORTs - each supports 3–16-bit word lengths, frame sync, internal/external clock, and optional G.711 companding. |
| Host Interface Port | Configurable 8-/16-bit HIP - 16 data/address pins + 11 control signals enable direct connection to 68000, 80C51, or ADSP-2101 hosts. |
| Power Consumption | 300 mW typical at 5.0 V / 30 ns; <0.55 mW in powerdown - enables battery-powered portable DSP systems with 100-cycle wake-up recovery. |
| Interrupt System | 11 total interrupts (3 external IRQs, 8 internal) - IRQ0/IRQ1 configurable on SPORT1 pins; all maskable except powerdown and reset. |
Pinout & Package
ADSP-2171BST-104 is housed in a 128-lead thin quad flat package (TQFP) with 0.4 mm lead pitch, thermally enhanced for embedded signal processing applications requiring compact board layout and reliable thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ADDR[13:0] | Address Output | 14-bit multiplexed address bus for program, data, and boot memory spaces. |
| DATA[23:0] | Data I/O | 24-bit bidirectional data bus - inputs only during boot from EPROM; two MSBs serve as boot address bits. |
| SPORT0[4:0] | Serial Port 0 I/O | TFS0/RFS0/DT0/DR0/SCLK0 - full-duplex synchronous interface with hardware companding support. |
| SPORT1[4:0] | Serial Port 1 I/O or IRQ | Configurable: DT1/DR1/TFS1/RFS1/SCLK1 or IRQ0/IRQ1/FO/FI - enables flexible interrupt routing and flag signaling. |
| HIP[15:0] | Host Interface Data/Address | 16-bit multiplexed or separate address/data bus - controlled by HMD1; supports 8-/16-bit host communication. |
| PWD / PWDACK | Power Control | PWD: active-low entry into CMOS standby; PWDACK: open-drain output confirming powerdown state. |
| BR / BG / BGH | Bus Arbitration | BR: request external bus control; BG: grant acknowledgment; BGH: hang logic prevents bus lockup during multi-master arbitration. |
Key Features
| Feature | Design Value |
|---|---|
| Single-Cycle Instruction Execution | Every instruction completes in one 30 ns cycle - including dual data moves, address pointer updates, and ALU/MAC/shifter operations. |
| Zero-Overhead Looping | Hardware loop counters and stacks eliminate branch overhead - critical for tight FIR/IIR filter kernels and FFT butterflies. |
| Bus Grant Hang Logic (BGH) | Prevents system deadlock when external bus master fails to release BR - ensures deterministic bus arbitration in multi-processor systems. |
| Programmable Wait State Generation | Supports slow external memories (e.g., 200 ns EPROM) without glue logic - seven wait states auto-generated on reset. |
| Dual-Purpose Program Memory | 2K × 24-bit RAM stores both code and coefficients - enables dynamic coefficient loading and LUT-based waveform synthesis. |
Applications
| Voice Codec Systems | Telecom Channel Processing |
|---|---|
Use Scenario: Real-time G.711 A-law/µ-law companding and echo cancellation in VoIP gateways and PSTN interface cards. IC Role / Device Role / Timing Role: Primary DSP engine performing 8 kHz sample-rate processing with dual SPORTs handling TDM streams and HIP managing host configuration. Use Value: Hardware companding reduces CPU load by 40% vs. software-only implementation; 30 ns cycle time ensures sub-100 µs latency per 128-sample frame. |
Use Scenario: Multi-channel T1/E1 line card processing with time-slot assignment, CAS/CCS signaling, and jitter buffering. IC Role / Device Role / Timing Role: Standalone channel processor per TDM frame - SPORT0 handles primary E1 stream, SPORT1 manages auxiliary signaling or host comms. Use Value: Dual SPORTs with independent framing allow concurrent 32-channel receive/transmit at 2.048 Mbps; 2K data RAM supports 256-sample jitter buffers per channel. |
| Portable Audio Processors | Industrial Sensor Signal Conditioning |
Use Scenario: Battery-powered handheld audio analyzers performing real-time spectral analysis and harmonic distortion measurement. IC Role / Device Role / Timing Role: Low-power DSP core executing FFT and THD algorithms - powerdown mode activated between measurements to extend battery life. Use Value: <0.55 mW standby power enables >100 hours of operation on AA batteries; 100-cycle wake-up ensures responsive user interface. |
Use Scenario: High-precision vibration monitoring in predictive maintenance systems using adaptive filtering and envelope detection. IC Role / Device Role / Timing Role: Embedded signal conditioner acquiring and preprocessing 10 kHz sensor data - DAGs manage circular buffers for streaming FFT input. Use Value: Independent DAGs with modulo addressing enable continuous 1024-point FFT on live data without DMA overhead; 2K program RAM holds multiple filter coefficient sets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-point DSP microcomputer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADSP-2172BST-104 | Includes 8K × 24-bit on-chip program ROM; otherwise identical architecture, pinout, and timing. | Eliminates need for external boot EPROM - suitable for sealed, field-upgrade-resistant designs. | Select when firmware immutability and reduced BOM count outweigh cost premium. |
| TMS320C549PGE | 16-bit fixed-point DSP with 100 MIPS @ 100 MHz; different instruction set, 144-pin LQFP; no integrated HIP or BGH. | Higher raw throughput but requires external glue logic for host interface and lacks ADSP-2100 code compatibility. | Select only when migrating legacy C54x code or requiring >33 MIPS - not drop-in compatible. |
Compared with ADSP-2171BST-104, ADSP-2172BST-104 adds boot ROM for standalone operation but shares identical power, timing, and peripheral behavior; TMS320C549PGE offers higher speed but demands full hardware and software redesign due to incompatible architecture and missing HIP/BGH features.
Availability
ADSP-2171BST-104 is available at Aetrix Electronics and suitable for voice codec systems, telecom channel processing, and portable audio processors requiring stable component supply, long-lifecycle support, and verified industrial-grade reliability.
Supply support for ADSP-2171BST-104 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, communications, and industrial applications.
The ADSP-217x product line delivers single-chip, low-power DSP microcomputers optimized for real-time audio, telecom, and portable embedded signal processing - extending the ADSP-2100 architecture with enhanced peripherals and power management.
FAQ
What is the operating voltage and instruction cycle time for ADSP-2171BST-104?
The ADSP-2171BST-104 operates at 5.0 V nominal supply and achieves a 30 ns instruction cycle time, delivering 33 MIPS performance. This timing is specified under conditions of a 16.67 MHz crystal input and stable 5.0 V rail - confirmed in the ADSP-217x datasheet Rev. A, Features section and General Description.
Does ADSP-2171BST-104 support hardware companding, and if so, which standards?
Yes, ADSP-2171BST-104 supports hardware A-law and µ-law companding per CCITT Recommendation G.711 in both serial ports (SPORT0 and SPORT1). This is implemented in dedicated companding circuitry within the SPORT blocks, eliminating CPU cycles for real-time voice encoding/decoding - detailed in the Serial Ports section of the datasheet.
Can ADSP-2171BST-104 boot from external memory, and what interfaces are supported?
Yes, ADSP-2171BST-104 supports automatic booting from byte-wide external memory such as 27C64/27C128/27C256/27C512 EPROMs via its data bus, or alternatively through the Host Interface Port (HIP) when BMODE = 1. Boot mode is selected by the BMODE pin, and seven wait states are generated automatically on reset to accommodate 200 ns memory access - per the Boot Circuitry section.
What low-power modes does ADSP-2171BST-104 provide, and what is its standby current?
ADSP-2171BST-104 provides Powerdown, Idle, and Slow Idle modes. In Powerdown mode, it draws less than 0.55 mW (typical) with CMOS standby - corresponding to <100 µA at 5.0 V - and recovers in 100 CLKIN cycles. This is documented in the LOW POWER OPERATION section of the datasheet Rev. A.
Is ADSP-2171BST-104 pin-compatible with other members of the ADSP-217x family?
Yes, ADSP-2171BST-104 is pin-compatible with ADSP-2172BST-104 and ADSP-2173BST-104 in the same 128-pin TQFP package. All share identical pin functions, electrical characteristics, and timing - differing only in voltage rating (ADSP-2171/2172 = 5.0 V; ADSP-2173 = 3.3 V) and on-chip ROM (ADSP-2172 adds 8K × 24-bit ROM).
ADSP-2171BST-104 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 128-LQFP
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Fixed Point
- Interface:
- Host Interface, Serial Port
- Clock Rate:
- 26MHz
- Non-Volatile Memory:
- External
- On-Chip RAM:
- 10kB
- Voltage - I/O:
- 5.00V
- Voltage - Core:
- 5.00V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 128-TQFP (14x20)
ADSP-2171BST-104 FAQ
1.How can I place an order for ADSP-2171BST-104 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADSP-2171BST-104 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADSP-2171BST-104 reliable?
The price and inventory of ADSP-2171BST-104 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADSP-2171BST-104 is usually 5 days.
3.What payment methods are accepted for ADSP-2171BST-104?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADSP-2171BST-104 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADSP-2171BST-104?
ADSP-2171BST-104 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADSP-2171BST-104 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADSP-2171BST-104?
For technical support, including ADSP-2171BST-104 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADSP-2171BST-104 requirements.
6.How does Aetrix verify that ADSP-2171BST-104 is sourced from the original manufacturer or authorized distributors?
All ADSP-2171BST-104 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADSP-2171BST-104 meets industry standards.
7.What is the process for return or replacement of ADSP-2171BST-104?
All ADSP-2171BST-104 units undergo pre-shipment inspection (PSI). If there is an issue with ADSP-2171BST-104, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADSP-2171BST-104 part is unused and in its original packaging.
Return procedure for ADSP-2171BST-104:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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