NXP Semiconductors MSC8256SAG1000B

Overview

The MSC8256SAG1000B from NXP Semiconductors (formerly Freescale) is a six-core programmable digital signal processor based on the SC3850 StarCore architecture, operating at up to 1 GHz per core and delivering 48,000 MMACS total. It integrates dual DDR2/DDR3 controllers (800 MHz data rate), two Serial RapidIO® interfaces (3.125 Gbaud), PCI Express® x1/x2/x4, and a QUICC Engine subsystem for offloaded packet processing - deployed in medical imaging systems, radar signal processors, and defense-grade test equipment.

For engineers reviewing the MSC8256SAG1000B datasheet, MSC8256SAG1000B pinout, MSC8256SAG1000B application, or MSC8256SAG1000B equivalent, key selection criteria include multicore deterministic latency, CLASS fabric arbitration bandwidth, DDR interface timing compliance, SerDes protocol flexibility (RapidIO/PCIe/SGMII multiplexing), and QUICC Engine independence from DSP cores.

Technical Context

The MSC8256SAG1000B implements six fully programmable SC3850 DSP cores with 32 KB L1 I-cache and 32 KB L1 D-cache per core, plus 512 KB unified L2 cache (M2 memory) and 1056 KB on-chip SRAM (M3 memory). Its CLASS interconnect fabric supports concurrent high-bandwidth access between cores, DDR controllers, and peripherals at up to 50 Gbps aggregate throughput.

It features a dual-RISC QUICC Engine subsystem running at 500 MHz, independently handling Gigabit Ethernet (RGMII/SGMII), TDM, and serial protocols - decoupling real-time packet I/O from DSP computation. The HSSI includes two x4 SerDes lanes supporting RapidIO x1/x4, PCIe x1/x2/x4, and SGMII with shared pin multiplexing.

Key Specifications

Pinout & Package

Package: 783-ball Fine-Pitch Column Grid Array (FC-PBGA), 29 mm × 29 mm, 1.0 mm ball pitch, RoHS-compliant, designed for thermal management in conduction-cooled rack systems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320C6678AZHHA and ADSP-SC589WZ-4, the MSC8256SAG1000B uniquely combines deterministic multicore DSP compute, hardware packet offload (QUICC Engine), and multi-protocol SerDes - making it irreplaceable in systems requiring simultaneous signal processing and secure, low-latency network transport.

Availability

The MSC8256SAG1000B is available at Aetrix Electronics and suitable for medical imaging systems, aerospace radar platforms, defense communications infrastructure, and advanced test equipment requiring stable component supply across long product lifecycles.

Supply support for MSC8256SAG1000B 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

NXP Semiconductors is a global semiconductor company formed from the spin-off of Freescale Semiconductor and merged with NXP's MCU and connectivity businesses - focused on secure, high-performance processing for automotive, industrial, and communications markets.

The MSC8256SAG1000B belongs to NXP's StarCore DSP family, engineered specifically for deterministic, high-throughput signal processing in safety-critical and mission-critical infrastructure where real-time latency, protocol offload, and long-term component availability are non-negotiable.

FAQ

What is the maximum DDR3 data rate supported by the MSC8256SAG1000B?

The MSC8256SAG1000B supports DDR3 data rates up to 800 MHz (effective 1600 MT/s) across two independent 32/64-bit controllers. Each controller complies with JEDEC DDR3L standards, supports on-die termination calibration, and interfaces with SODIMMs up to 2 GB capacity. This bandwidth is essential for feeding six SC3850 cores during sustained FFT or filter bank operations in the MSC8256SAG1000B.

Does the MSC8256SAG1000B include hardware support for real-time debugging?

Yes, the MSC8256SAG1000B integrates a full IEEE 1149.1-compliant JTAG Test Access Port with boundary scan architecture. It enables real-time profiling, cycle-accurate performance monitoring, and non-intrusive core halt/resume - all without disrupting QUICC Engine packet flow or CLASS fabric arbitration. This capability is documented in the MSC8256SAG1000B reference manual for production test and field diagnostics.

Can the MSC8256SAG1000B operate in extended temperature environments?

Yes, the MSC8256SAG1000B is qualified for industrial temperature range (–40°C to +105°C) per its FC-PBGA package specification and 45 nm SOI process. Thermal design guidelines in the MSC8256SAG1000B hardware design manual specify conduction-cooling requirements and PCB copper pour rules to maintain junction temperature below 115°C under full 48,000 MMACS load.

How does the QUICC Engine subsystem interact with the DSP cores in the MSC8256SAG1000B?

The QUICC Engine in the MSC8256SAG1000B operates as an independent dual-RISC subsystem running at 500 MHz - with its own instruction/data memory, DMA, and peripheral controllers. It communicates with DSP cores only via mailbox registers and shared memory regions arbitrated by the CLASS fabric. This strict isolation ensures that Gigabit Ethernet packet processing never stalls or competes for L2 cache or DDR bandwidth with the MSC8256SAG1000B's six DSP cores.

Is the MSC8256SAG1000B pin-compatible with other members of the MSC825x family?

Yes, the MSC8256SAG1000B is explicitly pin-compatible with all MSC825x and MSC815x devices per Freescale's MSC8256FS documentation. This allows hardware reuse across performance tiers - for example, upgrading from MSC8156 to MSC8256SAG1000B requires only firmware and DDR timing updates, not PCB redesign. Pin compatibility covers all interface balls, power domains, and JTAG signals in the 783-ball FC-PBGA footprint.