NXP Semiconductors MPC8555EPXAJD

Overview

MPC8555EPXAJD from NXP Semiconductors (formerly Freescale) is a PowerQUICC™ III integrated communications processor featuring an e500 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 networking infrastructure such as enterprise routers and wireless baseband units.

For engineers reviewing the MPC8555EPXAJD datasheet, MPC8555EPXAJD pinout, MPC8555EPXAJD application, or MPC8555EPXAJD equivalent, key selection criteria include its 783-pin FC-PBGA package, 1.2 V core supply with 3.3 V/2.5 V I/O domains, e500 Book E compatibility, hardware-accelerated crypto throughput, and dual TSEC support for GMII/RGMII/TBI interfaces.

Technical Context

The MPC8555EPXAJD implements a dual-issue superscalar e500 core with 32 KB L1 instruction and 32 KB L1 data caches (parity-protected), lockable per-line or globally, and supports single-precision floating-point operations. Its coherency module enables cache consistency between core and CPM subsystems.

It integrates a dedicated Security Engine with four crypto channels, five execution units (AESU, DEU, PKEU, AFEU, MDEU), and RNG - all accessible via descriptor-based DMA. The OCeaN three-port crossbar switch provides non-blocking packet routing between TSECs, FCCs, and memory, supporting up to 256-byte payloads with priority-based reordering and starvation avoidance.

Key Specifications

Pinout & Package

Package: 783-pin Fine-Pitch Ceramic Ball Grid Array (FC-PBGA), 29 mm × 29 mm, 1.0 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 MPC8555EPXAJD, MPC8548CZQK offers higher CPU clock and PCIe but removes OCeaN and SRAM-mode L2 - making it less suitable for tightly integrated packet-forwarding applications. P1022NSE delivers improved IPC and SerDes but abandons CPM compatibility, requiring full firmware rewrite for legacy communication protocols.

Availability

MPC8555EPXAJD is available at Aetrix Electronics and suitable for enterprise routing, wireless infrastructure, industrial gateways, and secure network appliances requiring stable component supply across long-lifecycle deployments.

Supply support for MPC8555EPXAJD 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 Power Architecture heritage.

The MPC8555EPXAJD belongs to the PowerQUICC III family - designed specifically for integrated communications processing in carrier-grade and enterprise networking equipment where deterministic real-time performance, hardware crypto acceleration, and multi-protocol I/O consolidation are essential.

FAQ

What is the maximum supported DDR SDRAM data rate for the MPC8555EPXAJD?

The MPC8555EPXAJD DDR controller supports first-generation DDR SDRAM with a 64-bit interface operating at up to 200 MHz clock frequency, delivering up to 3.2 GB/s peak bandwidth. It supports four banks, page mode (up to 16 open pages), and registered DIMMs. The interface is 2.5 V SSTL2-compatible with full ECC and auto-refresh capability - confirmed in Section 6 of the MPC8555E Hardware Specification Rev. 4.2.

Does the MPC8555EPXAJD support PCIe, and if not, what high-speed interconnects does it offer?

No, the MPC8555EPXAJD does not support PCIe. It provides PCI 2.2-compliant interfaces: one 64-bit or two 32-bit PCI ports operating at 16–66 MHz, with 3.3 V signaling, host/agent mode, and 64-bit DAC support. Its primary high-speed interconnects are dual TSECs (10/100/1000 Mbps Ethernet), OCeaN crossbar, and DDR SDRAM - all detailed in Sections 7, 8, and 13 of the MPC8555E Hardware Specification.

How many independent Ethernet MACs does the MPC8555EPXAJD integrate, and what physical layer interfaces do they support?

The MPC8555EPXAJD integrates two independent Three-Speed Ethernet Controllers (TSECs), each compliant with IEEE 802.3/802.3u/802.3z. They support GMII, MII, RGMII, RTBI, and TBI physical interfaces - enabling flexible PHY selection for 10/100/1000 Mbps operation. Both TSECs include 2 KB FIFOs, jumbo frame (9.6 KB) support, RMON statistics, and MII management - as specified in Section 8 of the MPC8555E Hardware Specification.

What cryptographic algorithms are accelerated by the Security Engine in the MPC8555EPXAJD?

The MPC8555EPXAJD Security Engine accelerates AES-128/192/256, DES/3DES, SHA-1/SHA-256, MD5, HMAC, RSA up to 2048-bit, Diffie-Hellman, elliptic curve cryptography (F_p/F_2m), and ARC4. It includes dedicated execution units (AESU, DEU, PKEU, AFEU, MDEU) and a FIPS-certified RNG - all accessible via four crypto channels with descriptor-based DMA, per Section 1.1 of the MPC8555E Hardware Specification.

Is the MPC8555EPXAJD pin-compatible with other PowerQUICC III processors like the MPC8548?

No, the MPC8555EPXAJD is not pin-compatible with the MPC8548 or other PowerQUICC III variants. It uses a 783-pin FC-PBGA package with unique pin assignments for its OCeaN switch, dual TSECs, and CPM peripherals. While both share the PowerQUICC III architecture, differences in I/O count, signal routing (e.g., absence of PCIe in MPC8555EPXAJD), and memory controller configuration prevent direct PCB replacement - confirmed by comparing Package and Pin Listings (Section 14) across respective datasheets.