NXP Semiconductors MPC8555EPXAPF

Overview

MPC8555EPXAPF from NXP Semiconductors (formerly Freescale) is a PowerQUICC™ III integrated communications processor featuring an e500 Power Architecture™ core, 256 KB on-chip L2 cache/SRAM, dual 10/100/1000 Ethernet controllers (TSEC), DDR SDRAM controller with 64-bit interface, and integrated security engine supporting AES, DES, SHA, RSA, and RNG. It targets high-throughput network infrastructure control planes in telecom edge routers and wireless base station controllers.

For engineers reviewing the MPC8555EPXAPF datasheet, MPC8555EPXAPF pinout, MPC8555EPXAPF application, or MPC8555EPXAPF equivalent, key selection criteria include its 1 GHz e500 core frequency (at 1.3 V), dual TSECs with RGMII/RTBI/GMII/TBI support, 783-pin FC-PBGA package, DDR-266/333 timing compliance, and hardware-accelerated IPSec/SSL offload capability - all validated for carrier-grade embedded networking designs.

Technical Context

The MPC8555EPXAPF implements a dual-issue, superscalar e500 core with 32 KB L1 instruction and 32 KB L1 data caches (parity-protected), plus a configurable 256 KB on-chip memory block usable as unified L2 cache or SRAM. Its CPM subsystem operates up to 333 MHz and handles serial protocols (HDLC, UART, USB, SPI, I²C) via FCCs, SCCs, and SMCs while maintaining software compatibility with prior PowerQUICC families.

System-level integration includes two PCI 2.2-compliant controllers (one 64-bit or two 32-bit), OCeaN three-port packet switch fabric, JTAG-based system access port, IEEE 1149.1 boundary scan, and programmable interrupt controller compliant with OpenPIC architecture - enabling deterministic real-time response in multi-protocol communication systems.

Key Specifications

Pinout & Package

Package: 783-pin FC-PBGA (35 mm × 35 mm, 1.0 mm pitch), RoHS-compliant, lead-free, with thermal lid. Pinout defined per Freescale MPC8555E Hardware Specification Rev. 4.2, Section 14 ("Package and Pin Listings").

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC8555EPXAPF, MPC8548CZQHHL offers higher compute density and PCIe/SATA but requires board redesign and loses OCeaN packet switching; LS1023A provides ARM compatibility and lower power but lacks dedicated crypto acceleration and PowerQUICC III peripheral integration - making MPC8555EPXAPF optimal for cost-sensitive, drop-in upgrades of existing PowerQUICC III platforms.

Availability

MPC8555EPXAPF is available at Aetrix Electronics and suitable for telecom edge routers, wireless base station controllers, industrial protocol gateways, and secure network appliances requiring stable component supply across extended product lifecycles.

Supply support for MPC8555EPXAPF 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 focused on secure connectivity solutions for automotive, industrial, and networking markets, with roots in Freescale's embedded processor heritage.

The MPC8555EPXAPF belongs to the PowerQUICC III product line, designed specifically for carrier-grade communications infrastructure requiring integrated processing, networking, and security acceleration in a single SoC.

FAQ

What is the maximum supported DDR SDRAM data rate for the MPC8555EPXAPF?

The MPC8555EPXAPF supports DDR SDRAM up to 333 MHz data rate (DDR-667), with programmable timing for first-generation DDR devices. Its 64-bit interface and four-bank support deliver up to 5.3 GB/s peak bandwidth, validated for use with x8/x16 DRAM configurations from 64 Mbit to 1 Gbit density. The DDR controller includes full ECC, page-mode support (up to 16 open pages), and self-refresh sleep mode - all confirmed in Freescale Hardware Specification Rev. 4.2, Section 6.

Does the MPC8555EPXAPF support PCIe, and if not, what high-speed interconnects does it offer?

No, the MPC8555EPXAPF does not support PCIe. It features two PCI 2.2-compliant controllers: one configurable as a 64-bit port or two independent 32-bit ports, operating at 16–66 MHz. These support host and agent modes, 64-bit DAC, memory prefetching, and PCI-to-memory streaming. For packet-switched interconnect, it integrates the OCeaN three-port crossbar fabric - distinct from PCIe - which routes traffic between TSECs, CPM, and PCI with priority-based arbitration. This is documented in Sections 13 and 1 of the MPC8555E Hardware Specification Rev. 4.2.

How many Ethernet MACs does the MPC8555EPXAPF integrate, and what physical layer interfaces do they support?

The MPC8555EPXAPF integrates two fully independent Three-Speed Ethernet Controllers (TSECs), each compliant with IEEE 802.3/802.3u/802.3z. Each TSEC supports GMII, MII, TBI, RGMII, and RTBI physical interfaces - enabling direct connection to 10/100 Mbps PHYs (via MII), 1000 Mbps copper/fiber PHYs (via GMII/TBI), or reduced-pin-count 10/100/1000 PHYs (via RGMII/RTBI). Both TSECs support jumbo frames (9.6 KB), RMON statistics, and MII management - as specified in Section 7 of the MPC8555E Hardware Specification Rev. 4.2.

What cryptographic algorithms are accelerated by the MPC8555EPXAPF Security Engine?

The MPC8555EPXAPF Security Engine accelerates AES (128/192/256-bit keys in ECB/CBC/CCM/Counter modes), DES/3DES (two- or three-key, ECB/CBC), SHA-1/SHA-256, MD5, HMAC, RSA (up to 2048-bit), Diffie-Hellman, and elliptic curve cryptography (F₂ₘ/Fₚ, up to 511-bit). It includes a dedicated Random Number Generator (RNG) and four crypto channels supporting chained command descriptors. These capabilities are verified in Section 1.1 of the MPC8555E Hardware Specification Rev. 4.2 and enable full IPSec/SSL/TLS offload without CPU intervention.

Is the MPC8555EPXAPF pin-compatible with other PowerQUICC III processors like the MPC8548?

No, the MPC8555EPXAPF is not pin-compatible with the MPC8548 or other PowerQUICC III variants. While both use FC-PBGA packages, the MPC8555EPXAPF has 783 pins and a 35 mm × 35 mm footprint, whereas the MPC8548 uses a 1295-pin PBGA (37 mm × 37 mm). Pin functions, power rail assignments (e.g., GVDD vs. OVDD domains), and signal multiplexing differ significantly - confirmed by comparing Section 14 (Package and Pin Listings) of the MPC8555E spec with MPC8548 documentation. Board-level replacement requires full layout redesign.