NXP Semiconductors DSP56301PW80

Overview

DSP56301PW80 from Freescale Semiconductor is a 24-bit programmable digital signal processor with DSP56300 core architecture, delivering 80 MIPS at 80 MHz internal clock, 3.3 V supply, and integrated 6-channel DMA, PLL, OnCE™ emulation, and JTAG TAP. It executes position-independent code with nested DO loops and fast auto-return interrupts in videoconferencing and cellular baseband processing.

For engineers reviewing the DSP56301PW80 datasheet, DSP56301PW80 pinout, DSP56301PW80 application, or DSP56301PW80 equivalent, key selection criteria include its 24-bit MAC (24×24+56→56), dual 56-bit accumulators, 56-bit barrel shifter, programmable on-chip memory configuration, and PCI Rev. 2.1–compliant HI32 host interface.

Technical Context

The DSP56301PW80 implements a fully pipelined 24×24-bit parallel MAC with 56-bit accumulator output and supports both 24-bit and 16-bit arithmetic under software control. Its address generation unit enables optimized DSP addressing modes including modulo and bit-reversed addressing for FFTs and filtering.

It integrates an on-chip instruction cache controller, concurrent six-channel DMA unit, and triple timer module-all synchronized to the internal PLL-generated clock. The external bus interface supports direct connection to SRAM, SSRAM, and DRAM without glue logic via dedicated chip select logic and DRAM controller.

Key Specifications

Pinout & Package

Package: 80-pin plastic quad flat pack (PQFP), body size 14 × 14 mm, 0.65 mm pitch, lead-free compliant (per Freescale DSP56301 Technical Data).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital signal processor applications.

Compared with ADSP-2189MKSTZ-120 and TMS320C549PGE, the DSP56301PW80 uniquely combines 24-bit fixed-point precision, PCI Rev. 2.1 compliance, on-chip DRAM control, and configurable instruction cache-making it optimal for integrated multimedia baseband subsystems where glueless expansion and deterministic latency are critical.

Availability

DSP56301PW80 is available at Aetrix Electronics and suitable for videoconferencing systems, cellular baseband modules, and professional audio effects processors requiring stable component supply across long-lifecycle industrial deployments.

Supply support for DSP56301PW80 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

Freescale Semiconductor was a global leader in embedded processing, analog, connectivity, and sensor solutions before its acquisition by NXP Semiconductors in 2015.

The DSP56301PW80 belongs to the DSP56300 family, designed specifically for cost-sensitive, high-throughput fixed-point signal processing in wireless infrastructure, telecom gateways, and multimedia endpoints.

FAQ

What clock frequency does the DSP56301PW80 operate at, and how is it generated?

The DSP56301PW80 operates with an internal 80 MHz clock derived from an external crystal (EXTAL/XTAL) or oscillator input, using its integrated Phase-Locked Loop (PLL). This allows flexible clock source selection while maintaining precise timing control. The PLL supports multiplication ratios to generate the internal 80 MHz from lower-frequency crystals (e.g., 10 MHz), reducing EMI and simplifying board layout. The DSP56301PW80's clock generator also provides multiple divided clocks for peripherals and external bus timing.

Does the DSP56301PW80 support real-time debugging, and what interface is used?

Yes, the DSP56301PW80 supports real-time debugging via its On-Chip Emulation (OnCE™) module and IEEE 1149.1 JTAG Test Access Port (TAP). This enables non-intrusive breakpoints, register inspection, and memory read/write during live operation. The OnCE™ module also supports address tracing mode, which mirrors internal bus activity on external pins for protocol analyzers. This capability is integral to the DSP56301PW80's development workflow and is documented in the DSP56301 User's Manual.

How much on-chip memory is available in the DSP56301PW80, and is it configurable?

The DSP56301PW80 offers configurable on-chip memory: up to 4096 × 24-bit program RAM, 2048 × 24-bit X data RAM, and 2048 × 24-bit Y data RAM. When instruction cache is enabled, program RAM is reduced to 3072 × 24-bit and cache size becomes 1024 × 24-bit. These allocations are set at boot via mode pins and are detailed in the DSP56301 Technical Data. This configurability allows optimization for either code density or execution speed depending on the DSP56301PW80 application.

Can the DSP56301PW80 interface directly with DRAM, and what support is provided?

Yes, the DSP56301PW80 includes an integrated DRAM controller that supports standard asynchronous DRAM parts (e.g., 1M×16, 4M×16) without external logic. It handles row/column addressing, refresh cycles, and RAS/CAS timing automatically. The controller connects via the external memory expansion port and is configured through dedicated registers in the DSP56301PW80's peripheral space. This eliminates the need for discrete DRAM controller ICs, reducing BOM cost and PCB area in memory-intensive DSP56301PW80 designs.

What host interface options does the DSP56301PW80 provide for system integration?

The DSP56301PW80 features a 32-bit PCI/Universal Host Interface (HI32) compliant with PCI Rev. 2.1, enabling direct connection to PCI buses without bridge logic. It also supports ISA interface with minimal buffering (74LS45-style). Additionally, the DSP56301PW80 includes two Enhanced Synchronous Serial Interfaces (ESSI) for daisy-chained ADC/DACs and a Serial Communications Interface (SCI) for UART-based host communication. These interfaces allow flexible host coupling in heterogeneous systems.