Analog Devices Inc. ADSP-21065LCCAZ240

Overview

ADSP-21065LCCAZ240 from Analog Devices is a 32-bit SHARC® floating-point DSP microcomputer optimized for high-throughput signal processing in audio, communications, and industrial systems. It delivers 198 MFLOPS peak performance, integrates 544 Kbits of configurable dual-ported SRAM, supports I²S with eight simultaneous Tx/Rx channels, and operates at 66 MHz core frequency (15 ns cycle time) with 3.3 V supply.

For engineers reviewing the ADSP-21065LCCAZ240 datasheet, ADSP-21065LCCAZ240 pinout, ADSP-21065LCCAZ240 application, or ADSP-21065LCCAZ240 equivalent, key selection criteria include sustained 132 MFLOPS compute throughput, glueless SDRAM interface at 66 MHz, dual-ported on-chip memory architecture enabling concurrent core/DMA access, and I²S/TDM serial port support for multichannel audio codec interfacing.

Technical Context

The ADSP-21065LCCAZ240 implements the Super Harvard Architecture with four independent buses-two data (PM/DM), one instruction, and one I/O-enabling single-cycle fetch of instruction and two operands. Its computation units (ALU, multiplier, shifter) execute parallel operations, supporting IEEE 32-bit single-precision and 40-bit extended-precision floating-point arithmetic alongside 32-bit fixed-point formats.

It features two hardware DAGs supporting up to 32 circular buffers, an on-chip instruction cache for conflict-free PM bus operation, and a 10-channel DMA controller (eight serial, two external port) that operates concurrently with full-speed core execution. The SDRAM interface provides glueless 66 MHz operation with pipelined address/control signaling for multi-SDRAM configurations.

Key Specifications

Pinout & Package

ADSP-21065LCCAZ240 is housed in a 196-ball Mini-BGA (CCAZ) package with 1.0 mm ball pitch, designed for high-density PCB layouts and thermal efficiency in embedded signal processing applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DSP microcomputer applications.

Compared with ADSP-21065LCCAZ240, ADSP-21062KCPZ-215 trades SDRAM interface and I²S channel count for higher clock rate in a smaller package, while ADSP-21369BBCZ-2A offers architectural evolution with SHARC+ ISA, integrated PLL, and SPDIF support-requiring board redesign but delivering 2× sustained MFLOPS and reduced external component count.

Availability

ADSP-21065LCCAZ240 is available at Aetrix Electronics and suitable for professional audio mixing consoles, digital communications baseband processors, and automotive active noise cancellation systems requiring stable component supply and long-term industrial lifecycle support.

Supply support for ADSP-21065LCCAZ240 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, Inc. is a global leader in high-performance analog, mixed-signal, and DSP technology, headquartered in Norwood, MA, with design centers worldwide and a legacy of innovation in signal processing ICs since 1965.

The ADSP-21065LCCAZ240 belongs to the SHARC® family of 32-bit floating-point DSPs, engineered specifically for computationally intensive, real-time signal processing applications in audio, communications, and industrial control where deterministic latency and numerical precision are critical.

FAQ

What is the maximum operating frequency and cycle time of the ADSP-21065LCCAZ240?

The ADSP-21065LCCAZ240 operates at a 66 MHz core frequency with a 15 ns instruction cycle time. This is achieved using a 33 MHz input clock (CLKIN), as the internal core runs at 2× the input clock frequency. All timing-critical interfaces-including SDRAM, external SRAM, serial ports, and multiprocessing-scale accordingly at 33 MHz or 66 MHz depending on function, and are fully specified in the ADSP-21065LCCAZ240 datasheet Rev. C.

Does the ADSP-21065LCCAZ240 support booting from external memory, and what boot sources are available?

Yes, the ADSP-21065LCCAZ240 supports three boot modes: from an 8-bit EPROM, from a host processor (8/16/32-bit), or from external memory. Boot source selection is controlled by the BMS (Boot Memory Select) and BSEL (EPROM Boot) pins. The device initializes its internal memory with program code via DMA transfer during power-up, and the boot sequence is fully documented in the ADSP-21065LCCAZ240 User's Manual and Technical Reference.

How many serial ports does the ADSP-21065LCCAZ240 have, and what audio protocols do they support?

The ADSP-21065LCCAZ240 has two independent synchronous serial ports (SPORT0 and SPORT1), each with primary and secondary transmit/receive channels. These ports support I²S mode for eight simultaneous transmit and eight receive channels, TDM multichannel mode with μ-law/A-law hardware companding, and standard DSP serial protocol. They interface gluelessly to industry-standard audio codecs such as the AD1819A AC'97 SoundPort, as confirmed in ADSP-21065LCCAZ240 application note TN-21065L-I2S.

What is the memory architecture of the ADSP-21065LCCAZ240, and how is the 544 Kbits SRAM organized?

The ADSP-21065LCCAZ240 contains 544 Kbits of on-chip SRAM divided into two dual-ported blocks: Block 0 (288 Kbits) and Block 1 (256 Kbits). Each block supports independent, single-cycle access by the core processor and DMA/IOP simultaneously. Memory can be configured as combinations of 16-, 32-, or 48-bit words-up to 16K × 32-bit data, 34K × 16-bit data, or 10K × 48-bit instructions-within the total 544 Kbit limit, as detailed in the ADSP-21065LCCAZ240 data sheet Section "Dual-Ported On-Chip Memory".

Is the ADSP-21065LCCAZ240 pin-compatible with other ADSP-2106x family members, and which models share the same Mini-BGA package?

The ADSP-21065LCCAZ240 is code- and function-compatible with the ADSP-21060/21061/21062, but it is not pin-compatible with the 208-lead MQFP variants. Within the Mini-BGA package family, the ADSP-21065LCCAZ240 shares the 196-ball CCAZ footprint with the ADSP-21065LKSZ-215 variant; however, differences in power sequencing, clocking, and certain control pin functions require verification against individual datasheets before substitution.