NXP Semiconductors MPC850DECVR50BU

Overview

MPC850DECVR50BU from Freescale Semiconductor is a PowerQUICC™ integrated communications processor featuring a 32-bit MPC8xx core, dual-port RAM (8 KB), two serial communications controllers (SCCs) with Ethernet/IEEE 802.3 support, USB 1.1 host/slave controller, and a dedicated RISC communications processor (CP). It operates at up to 50 MHz and targets cost-sensitive remote-access and telecommunications equipment requiring embedded protocol offload.

For engineers reviewing the MPC850DECVR50BU datasheet, MPC850DECVR50BU pinout, MPC850DECVR50BU application, or MPC850DECVR50BU equivalent, key selection factors include its dual SCCs with full 10-Mbps Ethernet capability, USB 1.1 support, PCMCIA-ATA interface, and low-power stop/sleep modes for telecom edge devices.

Technical Context

The MPC850DECVR50BU integrates a statically designed MPC8xx core (PowerPC architecture) with Harvard instruction/data caches (2 KB I-cache, 1 KB D-cache), MMUs with 8-entry TLBs, and a separate 32-bit RISC communications processor (CP) that handles serial protocol stacks independently. Its memory controller supports DRAM, SDRAM, SRAM, and flash across eight banks with programmable timing and boot-select options.

It implements a unified bus architecture with dynamic bus sizing (8/16/32-bit), IEEE 1149.1 JTAG debug interface, four independent baud-rate generators, time slot assigner for TDM multiplexing, and low-power states including Doze, Sleep, Deep Sleep, and Low-Power Stop - all coordinated via the system integration unit (SIU).

Key Specifications

Pinout & Package

Package: 352-ball Plastic Ball Grid Array (PBGA), 19 mm × 19 mm, 1.27 mm ball pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC850DEVR50B, MPC850DECVR50BU adds essential USB 1.1 support and uses a larger 352-ball PBGA for improved thermal dissipation; versus MPC860TVR50B, it trades TDM scalability and QMC features for lower BOM cost and simpler software stack - making it ideal for entry-level telecom edge platforms.

Availability

MPC850DECVR50BU is available at Aetrix Electronics and suitable for DSL modems, industrial protocol gateways, remote access servers, and VoIP terminal adapters requiring stable component supply and long-term lifecycle support.

Supply support for MPC850DECVR50BU 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 (now part of NXP Semiconductors) was a leading designer of embedded processors and analog/mixed-signal ICs for automotive, networking, and industrial markets.

The MPC850DECVR50BU belongs to the PowerQUICC™ family - engineered specifically for cost-sensitive communications infrastructure where protocol offload, multi-interface integration, and deterministic real-time performance are critical.

FAQ

What is the maximum operating frequency of the MPC850DECVR50BU?

The MPC850DECVR50BU operates at a maximum core frequency of 50 MHz. Its bus interface supports native 50 MHz operation; for higher core speeds (e.g., 66 MHz or 80 MHz), the device must be configured in half-speed bus mode - resulting in a 33 MHz or 40 MHz bus clock respectively - as confirmed in the Bus Signal Timing section of the hardware specifications.

Does the MPC850DECVR50BU support USB functionality?

Yes, the MPC850DECVR50BU includes a full USB 1.1 controller supporting both host and peripheral modes at 1.5 Mbps (low-speed) and 12 Mbps (full-speed). This is explicitly confirmed in the MPC850 Family Functionality Matrix, where "MPC850DE" (the base variant for MPC850DECVR50BU) lists "Yes" under USB Support, distinguishing it from non-USB variants like MPC850.

What package type is used for the MPC850DECVR50BU?

The MPC850DECVR50BU uses a 352-ball Plastic Ball Grid Array (PBGA) package measuring 19 mm × 19 mm with 1.27 mm ball pitch. This is documented in the Mechanical Data and Ordering Information section (Section 9) of the MPC850 hardware specifications and confirmed by Freescale's official ordering codes for the "BU" suffix variant.

How many serial communications controllers (SCCs) does the MPC850DECVR50BU integrate?

The MPC850DECVR50BU integrates two serial communications controllers (SCCs), as specified in the MPC850 Family Functionality Matrix for the "MPC850DE" variant. Each SCC supports Ethernet/IEEE 802.3 at 10 Mbps, HDLC/SDLC up to 2 Mbps, UART, IrDA, and transparent bit-stream modes - enabling dual-port network connectivity or mixed protocol operation.

What power supply voltages are required for the MPC850DECVR50BU?

The MPC850DECVR50BU requires four 3.3 V supply domains: VDDH (core high-voltage), VDDL (core low-voltage), KAPWR (kernel power), and VDDSYN (PLL synthesis power), each rated 3.0 V to 3.6 V at ≤40 MHz and 3.135 V to 3.465 V at >40 MHz. All general-purpose I/O pins tolerate 5 V, provided input voltage does not exceed VDDH + 2.5 V.