ADSP‑21489BSWZ‑4B Complete Technical Summary

1. Basic Identification

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2. Core Performance & Benchmarks

• Peak Performance: 2.4 GFLOPS @ 400 MHz
• 1024‑Point Complex FFT (Radix‑4): 23 μs
• FIR Filter (per tap): 1.25 ns
• IIR Filter (per biquad): 5 ns
• [3×3] × [3×1] Matrix Multiply: 11.25 ns
• Divide (y/x): 7.5 ns

3. Memory & Interfaces

3.1 Internal Memory

• RAM: 5 Mbits (single‑cycle access)
• ROM: 4 Mbits (Dolby/DTS audio decoders)
• Organization: 4 blocks supporting 16‑/32‑/48‑/64‑bit word access

3.2 External Memory Interface

• SDRAM Controller: 16‑bit, up to 166 MHz
• Asynchronous Memory Interface (AMI): SRAM/Flash/ROM
• Addressing: Up to 4 external banks

3.3 Audio & Communication Peripherals

• 8× Serial Ports (SPORTs): I²S, TDM, left/right justified
• S/PDIF Transceiver: Tx/Rx with biphase encoding
• 4× ASRC: Asynchronous Sample Rate Converters, up to −128 dB SNR
• DAI: Digital Applications Interface with flexible SRU routing
• DPI: Digital Peripheral Interface
• 2× SPI, 1× UART, 1× TWI (I²C)
• 4× Precision Clock Generators (PCG)
• IDP/PDAP: Input Data Port / Parallel Data Acquisition Port
• PWM: 4 units (16 outputs)
• Watchdog Timer (176‑lead package)
• Thermal Diode for on‑die temperature monitoring

3.4 Accelerators

• FFT, FIR, IIR hardware accelerators
• MTM (Memory‑to‑Memory) DMA
• Up to 65 DMA channels (scatter/gather, delay line)

4. Electrical Specifications

5. Package & Thermal Data

• Package: 176‑Lead LQFP_EP, 24 mm × 24 mm
• Exposed Pad: Must be soldered to GND plane
• θJA (junction‑to‑ambient): 16.9 °C/W (0 m/s airflow)
• θJC (junction‑to‑case): 2.3 °C/W
• ΨJB (junction‑to‑board): 13.8 °C/W

6. Pin & Boot Features

• Pin Count: 176 (LQFP_EP)
• Boot Modes (BOOT_CFG[2:0]):
• Clock Configuration: CLK_CFG[1:0] sets core clock ratio
• JTAG / Emulation: Full debug via IEEE 1149.1 TAP

7. Key Features

• Code‑compatible with entire SHARC family
• Variable Instruction Set Architecture (VISA: 16/32/48‑bit)
• Single‑cycle fetch of instruction + four operands
• Hardware circular buffers (zero overhead)
• Fast context switch via secondary registers
• Current‑limit & thermal shutdown protection
• Automotive qualified for infotainment & audio

8. Target Applications

• Automotive infotainment & premium audio
• Professional audio systems & AV receivers
• Industrial audio processing & instrumentation
• Medical devices & communications
• Home theater & multi‑channel audio systems

9. Ordering & Packaging

• Part Number: ADSP‑21489BSWZ‑4B
• Speed: 400 MHz
• RAM: 5 Mbits
• Temp: −40°C to +125°C
• Package: 176‑LQFP_EP
• RoHS Compliant: Yes