NXP Semiconductors MPC862PZQ100B

Overview

MPC862PZQ100B from NXP Semiconductors (formerly Freescale) is a PowerQUICC™ II integrated communications processor featuring a 32-bit MPC8xx PowerPC core, 16-Kbyte instruction cache, 8-Kbyte data cache, and integrated Fast Ethernet Controller (FEC), Communications Processor Module (CPM), and System Integration Unit (SIU). It operates at up to 100 MHz with 3.3 V supply and supports ATM-enhanced SAR functionality for broadband access equipment.

For engineers reviewing the MPC862PZQ100B datasheet, MPC862PZQ100B pinout, MPC862PZQ100B application, or MPC862PZQ100B equivalent, key selection criteria include its 357-pin PBGA package, dual 10/100 MII/UTOPIA interface capability, four SCCs with serial ATM support, 32-bit DRAM controller with eight banks, and embedded CPM with 8-Kbyte dual-port RAM - all critical for carrier-grade DSLAM, ATM edge router, and integrated access device design.

Technical Context

The MPC862PZQ100B implements a single-issue PowerPC architecture core with MMU, 32-entry ITLB/DTLB, and physically addressed caches supporting 4/16/512 Kbyte and 8 Mbyte page sizes. Its CPM executes communication-specific RISC instructions (e.g., GRACEFUL STOP TRANSMIT) and manages up to 16 SDMA channels across four SCCs and two SMCs.

It integrates a full-featured SIU with clock synthesizer, IEEE 1149.1 JTAG debug interface, software watchdog, PIT, RTC, and low-power modes (Doze/Sleep/Deep Sleep). The FEC supports simultaneous MII and UTOPIA Level 2 operation, while the enhanced SAR (ESAR) mode delivers OAM performance monitoring, multi-PHY UTOPIA support, and ATM port-to-port switching without microcode.

Key Specifications

Pinout & Package

357-pin plastic ball grid array (PBGA), 27 mm × 27 mm, 1.27 mm pitch, RoHS-compliant. Thermal pad on underside requires solder connection to internal ground plane for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC860PZQ100B, MPC862PZQ100B delivers 2.1× higher ATM cell processing throughput and integrated UTOPIA/MII coexistence; versus MPC8623ZQ100B, it offers identical communications subsystem performance at lower cost and smaller footprint but lacks PCI/USB for peripheral expansion.

Availability

MPC862PZQ100B is available at Aetrix Electronics and suitable for DSLAM line cards, ATM edge routers, integrated access devices, carrier remote terminals, and broadband network termination requiring stable component supply across long product lifecycles.

Supply support for MPC862PZQ100B 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 communications markets, with heritage from Freescale's PowerQUICC™ portfolio.

The MPC862PZQ100B belongs to the PowerQUICC™ II family, designed specifically for carrier-class broadband infrastructure requiring integrated ATM, Ethernet, and TDM processing in a single SoC.

FAQ

What is the maximum operating frequency of the MPC862PZQ100B and how does bus speed relate?

The MPC862PZQ100B supports a maximum CPU frequency of 100 MHz in 2:1 mode, where the internal bus runs at 50 MHz. In 1:1 mode, both CPU and bus operate at the same frequency, capped at 66 MHz. This ratio is enforced by the internal PLL and memory controller timing constraints - attempting to run the bus above 50 MHz in 2:1 mode violates setup/hold requirements for DRAM and peripheral interfaces. The MPC862PZQ100B datasheet specifies that 100 MHz operation requires configuration of the BRG and CPM registers to enable 2:1 mode before initialization.

Does the MPC862PZQ100B support simultaneous MII and UTOPIA operation, and what are the physical layer implications?

Yes, the MPC862PZQ100B supports simultaneous MII and UTOPIA Level 2 operation using a time-multiplexed bus architecture. This allows concurrent 10/100Base-T Ethernet management traffic and ATM cell transport without external arbitration. The MII interface uses dedicated pins (MII_TXD[0:3], MII_RXD[0:3], MII_MDC, MII_MDIO), while UTOPIA shares signals with SCC4 in multiplexed mode. Physical layer implementation requires separate PHYs: an Ethernet PHY (e.g., DP83848) for MII and an ATM PHY (e.g., IDT77V33) for UTOPIA, with careful PCB layout to isolate 50-Ω differential MII traces from single-ended UTOPIA signals.

How does the Enhanced SAR (ESAR) mode in the MPC862PZQ100B differ from standard SAR implementations?

The ESAR mode in the MPC862PZQ100B introduces ROM-resident AAL2/VBR functionality, OAM performance monitoring counters, multi-level APC priority queues, and hardware-accelerated ATM port-to-port switching - all implemented without external microcode RAM. Unlike standard SAR engines requiring external RAM-based microcode for cell processing, ESAR offloads these functions to dedicated CPM microcode ROM, reducing latency by up to 12% and eliminating RAM access bottlenecks. The MPC862PZQ100B also adds statistical cell counters per PHY and split-bus full-duplex UTOPIA operation, which are absent in earlier MPC860SAR derivatives.

What thermal management requirements apply to the MPC862PZQ100B in 100 MHz operation?

At 100 MHz in 2:1 mode, the MPC862PZQ100B dissipates up to 1.54 W (max), requiring junction temperature control below 115°C. With RθJB = 13°C/W, board temperature must stay ≤ 95°C to meet this limit - achievable using a 4-layer PCB with internal ground/power planes and thermal vias under the exposed pad. Natural convection on a 4-layer board yields RθJA = 23°C/W, meaning ambient must be ≤ 77°C. Forced air (200 ft/min) reduces RθJA to 19°C/W, allowing 80°C ambient. The MPC862PZQ100B thermal design must avoid exceeding 105°C junction in standard temp grade operation.

Can the MPC862PZQ100B's Time Slot Assigner (TSA) interface with all serial peripherals, and what are its routing capabilities?

The MPC862PZQ100B's TSA supports dynamic time-slot assignment for up to six serial channels: four SCCs and two SMCs. It provides 1- or 8-bit resolution slot mapping, independent transmit/receive routing, frame synchronization, and clock recovery - enabling T1, E1, ISDN BRI/ PRI, and custom PCM highway configurations. Routing is configured via CPM register writes and supports real-time changes without interrupting active channels. The TSA does not interface with SPI, I²C, or FEC; its input sources are exclusively SCC/SMC serial streams, and outputs feed directly to the CPM's SDMA channels for DMA-based buffering.