NXP Semiconductors MPC860DPZQ66D4

Overview

MPC860DPZQ66D4 from NXP (formerly Freescale) is a PowerQUICC™ integrated communications controller combining a 32-bit Power Architecture™ CPU core with a dedicated RISC communications processor module (CPM), 16 KB instruction cache, 8 KB data cache, and integrated 10/100 Mbps Ethernet MAC. It operates at 66 MHz, supports up to four serial communications controllers (SCCs), and targets embedded networking gateways and industrial protocol converters.

For engineers reviewing the MPC860DPZQ66D4 datasheet, MPC860DPZQ66D4 pinout, MPC860DPZQ66D4 application, or MPC860DPZQ66D4 equivalent, key selection considerations include its dual-core architecture (CPU + CPM), IEEE 802.3u-compliant Ethernet MAC, UTOPIA ATM interface capability, 357-pin PBGA package, and support for DRAM/SRAM/Flash memory interfaces without glue logic.

Technical Context

The MPC860DPZQ66D4 implements a split-processor architecture: a 32-bit Power Architecture CPU core with MMU, instruction/data caches, and branch prediction handles general-purpose tasks, while the independent CPM executes time-critical communication protocols-including HDLC, UART, IrDA, and ATM cell processing-without CPU intervention. Its memory controller supports eight banks with programmable wait states and glueless interfacing to DRAM, SRAM, Flash, and PCMCIA.

It integrates a system integration unit (SIU) with real-time clock, watchdog timer, JTAG debug interface, and clock synthesizer; features four SCCs configurable for Ethernet, HDLC, or PPP; and provides UTOPIA Level 1 master interface for ATM physical layer devices at 25/51/155 Mbps framing rates.

Key Specifications

Pinout & Package

Package: 357-pin Plastic Ball Grid Array (PBGA), case number 5058 (1103D-02), 25 mm × 25 mm body, 1.27 mm ball pitch, ZQ suffix per Freescale ordering nomenclature.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar integrated communications controller applications.

Compared with MPC860DPZQ66D4, MPC860PZQ66D4 offers identical performance and compatibility with updated manufacturing yield, while MPC855TZQ66D4 sacrifices protocol versatility and peripheral count to reduce cost - making it unsuitable for multi-interface telecom edge nodes.

Availability

MPC860DPZQ66D4 is available at Aetrix Electronics and suitable for industrial protocol gateways, DSL customer premises equipment, telecom access routers, and secure remote terminal units requiring stable component supply across extended product lifecycles.

Supply support for MPC860DPZQ66D4 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 leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in Power Architecture technology.

The MPC860 family was designed specifically for embedded communications infrastructure - integrating CPU, CPM, Ethernet, ATM, and memory control to replace multi-chip controller boards in networking edge devices.

FAQ

What is the maximum operating frequency of the MPC860DPZQ66D4 and how does it affect bus timing?

The MPC860DPZQ66D4 supports a maximum CPU frequency of 66 MHz in 1:1 bus mode, where CPU and bus clocks run synchronously. At this speed, the memory controller delivers valid data within 3.80 ns after CLKOUT rising edge (B8 timing parameter), enabling sub-4 ns access to fast SRAM. Operation above 66 MHz requires 2:1 mode (e.g., 80 MHz CPU with 40 MHz bus), which relaxes setup/hold timing margins but increases internal pipeline stalls. The MPC860DPZQ66D4 datasheet specifies all AC timings at 33/40/50/66 MHz, with 66 MHz being the highest fully characterized speed.

Does the MPC860DPZQ66D4 include an integrated Ethernet PHY or require an external one?

The MPC860DPZQ66D4 integrates only the 10/100 Mbps Ethernet MAC layer (on SCC1–SCC4) and does not include a physical layer transceiver. It requires an external PHY chip connected via MII (Media Independent Interface) signals (MII_MDIO, MII_MDC, MII_TXD[0:3], etc.) or raw serial interface. This separation allows designers to select PHYs optimized for specific media (e.g., copper, fiber, or PoE-capable variants) while retaining full MAC functionality within the MPC860DPZQ66D4.

How does the Communications Processor Module (CPM) in the MPC860DPZQ66D4 differ from the main CPU core?

The CPM in the MPC860DPZQ66D4 is a dedicated 16-bit RISC processor with its own 8 KB dual-port RAM, 16 SDMA channels, and specialized instruction set for serial protocol handling - operating independently of the 32-bit Power Architecture CPU core. While the CPU runs the OS and application code, the CPM autonomously manages HDLC framing, UART bit sampling, ATM cell assembly/disassembly, and SCC/SMC I/O without CPU intervention. This parallelism enables deterministic real-time response (e.g., <1 µs HDLC abort detection) and frees the CPU for higher-layer tasks, a key differentiator of the MPC860DPZQ66D4 architecture.

What package type and thermal characteristics apply to the MPC860DPZQ66D4?

The MPC860DPZQ66D4 uses a 357-pin PBGA package (ZQ designation, case 5058, 25 × 25 mm, 1.27 mm pitch) with junction-to-board thermal resistance (RθJB) of 13 °C/W on a 4-layer board. Its maximum junction temperature is 95 °C, and typical power dissipation at 66 MHz is 722 mW (1:1 mode) or 762 mW (2:1 mode). Thermal design must prioritize ground-plane connectivity through thermal balls and use ≥4 × 0.1 µF bypass capacitors per VDD domain to maintain voltage stability under CPM-driven current transients.

Can the MPC860DPZQ66D4 support both Ethernet and ATM simultaneously, and what constraints apply?

Yes, the MPC860DPZQ66D4 can operate Ethernet and ATM concurrently, but with a functional constraint: IEEE 802.3u 10/100 Mbps Ethernet is disabled when the UTOPIA interface is active for ATM, as both share SCC resources and timing domains. To achieve simultaneous operation, designers must assign Ethernet to one SCC (e.g., SCC1) and ATM to the UTOPIA interface driven by the CPM - verified in Freescale Application Note AN2101. This configuration requires careful clock tree partitioning and buffer allocation between the CPU and CPM memory spaces to avoid contention.