NXP Semiconductors MPC8555EVTALF

Overview

MPC8555EVTALF 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, DDR SDRAM controller, PCI 2.2 interface, and hardware security engine. It targets networking infrastructure, telecom base stations, and wireless access equipment requiring deterministic real-time packet processing and cryptographic acceleration.

For engineers reviewing the MPC8555EVTALF datasheet, MPC8555EVTALF pinout, MPC8555EVTALF application, or MPC8555EVTALF 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, dual TSEC support for GMII/RGMII/TBI, and integrated Security Engine with AES/DES/SHA/RSA acceleration.

Technical Context

The MPC8555EVTALF implements a dual-issue superscalar e500 core with 32 KB L1 instruction and 32 KB L1 data caches, both parity-protected and lockable per line. Its coherency module enables cache consistency between core and CPM subsystems. The CPM operates up to 333 MHz and handles serial protocols including HDLC, ATM via UTOPIA, and USB 1.1 through SCC multiplexing.

It integrates an OCeaN three-port crossbar switch for internal packet routing between TSECs, FCCs, and memory, supporting priority-based reordering and starvation avoidance. The DDR controller supports 64-bit interfaces at up to 266 MHz data rate with full ECC, registered DIMM compatibility, and self-refresh sleep mode-critical for carrier-grade system uptime.

Key Specifications

Pinout & Package

Package: 783-pin Fine-Pitch Ceramic Ball Grid Array (FC-PBGA), 27 mm × 27 mm, 1.0 mm ball pitch, RoHS-compliant. Thermal pad on underside requires solder paste stencil design for optimal heat dissipation in 105°C junction-limited deployments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC8555EVTALF, MPC8548CZQHHL offers higher CPU performance but sacrifices hardware security acceleration, while P2020NSN2KFC provides modern architecture and enhanced crypto capability at the cost of PCB redesign and toolchain migration.

Availability

MPC8555EVTALF is available at Aetrix Electronics and suitable for wireless infrastructure, carrier-grade routing, and industrial protocol gateway applications requiring stable component supply across extended product lifecycles.

Supply support for MPC85555EVTALF 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 communication markets, with roots in Freescale's PowerQUICC lineage.

The MPC8555EVTALF belongs to the PowerQUICC III product line, designed specifically for embedded communications infrastructure where deterministic real-time packet processing, hardware-accelerated cryptography, and multi-protocol I/O integration are essential.

FAQ

What is the maximum operating frequency of the MPC8555EVTALF e500 core?

The MPC8555EVTALF e500 core operates at up to 1.0 GHz when powered with a 1.3 V core supply, as specified in the recommended operating conditions. At 1.2 V, the maximum rated frequency is 833 MHz. This speed grade is confirmed in Table 4 of the Hardware Specification Rev. 4.2, where 1000 MHz operation requires VDD = 1.3 V ±50 mV. The MPC8555EVTALF part number corresponds to this 1 GHz speed bin.

Does the MPC8555EVTALF support DDR3 memory?

No, the MPC8555EVTALF supports only first-generation DDR SDRAM (DDR1) with 2.5 V SSTL2-compatible I/O. Its DDR controller lacks DDR2 or DDR3 command encoding, termination schemes, or timing parameters. The specification explicitly states "programmable timing supporting first generation DDR SDRAM" and defines GVDD = 2.5 V ±125 mV, matching DDR1-not DDR3-voltage requirements. MPC8555EVTALF cannot interface with DDR2 or DDR3 modules.

How many Ethernet MACs does the MPC8555EVTALF integrate, and what physical layer interfaces do they support?

The MPC8555EVTALF integrates two fully independent Three-Speed Ethernet Controllers (TSECs), each compliant with IEEE 802.3/802.3u/802.3z. They support GMII, MII, TBI, RGMII, and RTBI physical interfaces. The Hardware Specification confirms dual TSECs with 2-Kbyte FIFOs, jumbo frame support up to 9.6 KB, and MII management interfaces. This enables MPC8555EVTALF to drive two separate Gigabit Ethernet links simultaneously-e.g., one for WAN and one for LAN-without external PHYs when using RGMII or GMII.

What cryptographic algorithms are accelerated by the MPC8555EVTALF Security Engine?

The MPC8555EVTALF Security Engine accelerates AES-128/192/256, DES/3DES, SHA-1/256, MD5, HMAC, RSA up to 2048 bits, Diffie-Hellman, and elliptic curve cryptography (F2m/Fp). It includes dedicated execution units: AESU, DEU, MDEU, PKEU, AFEU, and RNG. These are documented in Section 1.1 "Key Features" of the Hardware Specification Rev. 4.2. The MPC8555EVTALF uses this engine to offload IPSec, SSL/TLS, and IEEE 802.11i processing from the e500 core.

Is the MPC8555EVTALF pin-compatible with other PowerQUICC III processors like the MPC8548?

No, the MPC8555EVTALF 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 dual TSECs, OCeaN switch, and Security Engine interfaces. The MPC8548 uses a 783-pin package but with different signal mapping-confirmed by comparing Package and Pin Listings sections in their respective datasheets. Board-level replacement of MPC8555EVTALF with MPC8548 requires PCB redesign and firmware adaptation.