NXP Semiconductors MPC8540PX833LB

Overview

MPC8540PX833LB from Freescale Semiconductor is a PowerQUICC III integrated host processor featuring a 32-bit e500 Power Architecture core, 256 KB configurable L2 cache/SRAM, dual 10/100/1000 Mbps TSEC Ethernet controllers, DDR-1 SDRAM controller (64-bit, up to 333 MHz), PCI/PCI-X (64-bit, 133 MHz), and RapidIO (8-bit, 500 MHz data rate). It targets high-throughput networking infrastructure such as enterprise routers and wireless baseband units.

For engineers reviewing the MPC8540PX833LB datasheet, MPC8540PX833LB pinout, MPC8540PX833LB application, or MPC8540PX833LB equivalent, key selection criteria include its 833 MHz core frequency, 783-pin FC-PBGA package, DDR-1 memory interface timing, TSEC RGMII/RTBI/GMII support, and RapidIO atomic operation capability - all critical for deterministic packet processing in telecom edge systems.

Technical Context

The MPC8540PX833LB implements the Book E–enhanced e500 core with separate 32 KB L1 instruction and data caches (parity-protected), an on-chip OCeaN four-port crossbar switch for internal interconnect arbitration, and a coherency module enabling cache snooping across local bus, DMA, and RapidIO masters. Its DDR SDRAM controller supports registered DIMMs, auto-refresh, and ECC-protected 64-bit transfers at up to 333 MHz data rate.

It integrates dual IEEE 802.3-compliant TSECs with full RMON statistics, jumbo frame (9.6 KB) support, and MII/GMII/TBI/RGMII/RTBI PHY interfaces; a PCI/PCI-X controller operating in host or agent mode at up to 133 MHz; and a programmable 4-channel DMA engine supporting scatter-gather, misaligned transfers, and hardware-enforced snoop/no-snoop coherency per channel.

Key Specifications

Pinout & Package

The MPC8540PX833LB is housed in a 783-ball Fine-Pitch Ceramic Ball Grid Array (FC-PBGA) package with 1.0 mm ball pitch, designed for high-density PCB layouts and thermal dissipation in telecom chassis environments. Pin assignments follow the documented ball map in Section 14 of the MPC8540 Hardware Specifications Rev. 4.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC8548ECZQAGD and P1022NSE, the MPC8540PX833LB delivers optimal balance of proven 833 MHz performance, RapidIO determinism, and DDR-1 compatibility for cost-sensitive telecom infrastructure refreshes - avoiding unnecessary crypto overhead or architectural rework.

Availability

MPC8540PX833LB is available at Aetrix Electronics and suitable for enterprise routing, wireless baseband, industrial gateway, secure firewall, and telecom control plane applications requiring stable component supply and long-term lifecycle support.

Supply support for MPC8540PX833LB 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) is a fabless semiconductor company specializing in embedded processing, connectivity, and analog solutions for automotive, industrial, and networking markets.

The MPC8540PX833LB belongs to the PowerQUICC III family, engineered specifically for high-bandwidth, low-latency communications infrastructure where deterministic I/O coherency, multi-protocol integration, and thermal efficiency are critical.

FAQ

What is the maximum DDR-1 data rate supported by the MPC8540PX833LB?

The MPC8540PX833LB supports DDR-1 SDRAM at up to 333 MHz data rate (166 MHz clock), delivering 5.3 GB/s peak bandwidth across its 64-bit interface. This is confirmed in Section 6 of the MPC8540 Hardware Specifications Rev. 4.1, which specifies programmable timing parameters for DDR-1 chips ranging from 64 Mbit to 1 Gbit density with x8/x16 data ports. The MPC8540PX833LB achieves this rate with full ECC and registered DIMM support.

Does the MPC8540PX833LB support RapidIO atomic operations?

Yes, the MPC8540PX833LB supports RapidIO atomic increment, decrement, set, and clear operations as defined in the RapidIO specification. These are implemented in the RapidIO message unit and protected by CRC at the packet level. Section 13 of the MPC8540 Hardware Specifications Rev. 4.1 explicitly lists atomic operation support, and the OCeaN crossbar ensures deterministic latency for these operations across the internal interconnect.

What package type and pin count does the MPC8540PX833LB use?

The MPC8540PX833LB uses a 783-ball Fine-Pitch Ceramic Ball Grid Array (FC-PBGA) package with 1.0 mm ball pitch. This is documented in Section 14 ("Package and Pin Listings") of the MPC8540 Hardware Specifications Rev. 4.1 and confirmed by the device nomenclature in Section 19, where "PX" denotes the FC-PBGA variant. Thermal and mechanical data sheets further validate the 35 mm × 35 mm body size and JEDEC-standard footprint.

Can the MPC8540PX833LB operate with both 2.5 V and 3.3 V TSEC I/O voltage?

Yes, the MPC8540PX833LB supports configurable TSEC I/O voltage: LVDD may be set to either 2.5 V ± 125 mV or 3.3 V ± 165 mV depending on the attached PHY interface (e.g., RGMII at 2.5 V vs. GMII at 3.3 V). Table 2 in Section 2.1.3 of the Hardware Specifications Rev. 4.1 lists both options, and the TSEC electrical characteristics in Table 6 confirm power consumption values for both LVDD settings.

What is the role of the OCeaN switch fabric in the MPC8540PX833LB?

The OCeaN (On-Chip Accelerated Network) switch fabric in the MPC8540PX833LB is a four-port crossbar that arbitrates concurrent access to shared resources - primarily DDR memory, TSECs, RapidIO, and PCI - without contention. As described in Section 1.1 and Figure 1 of the Hardware Specifications Rev. 4.1, it implements priority-based packet reordering and starvation avoidance, enabling deterministic latency for time-critical traffic like control-plane messages or real-time baseband data in the MPC8540PX833LB.