NXP Semiconductors MPC8245LZU350D

Overview

MPC8245LZU350D from Freescale Semiconductor is a 32-bit PowerPC™ MPC603e-based integrated processor combining a superscalar CPU core with PCI bridge, memory controller, DUART, DMA, and I2C peripherals in a single TBGA package. It operates at up to 350 MHz CPU frequency, supports 66-MHz PCI bus and 100-MHz SDRAM interface, and targets embedded control systems requiring high integration and deterministic real-time response.

For engineers reviewing the MPC8245LZU350D datasheet, MPC8245LZU350D pinout, MPC8245LZU350D application, or MPC8245LZU350D equivalent, key selection considerations include its 350-MHz CPU speed grade, 3.3-V/5-V tolerant PCI interface, dual UART support, ECC-capable SDRAM controller, and dynamic power management modes (nap/doze/sleep) for thermal-constrained industrial platforms.

Technical Context

The MPC8245LZU350D integrates a full-featured MPC603e core-featuring 16-Kbyte instruction and data caches, FPU, MMU, and lockable L1 cache ways-with a peripheral logic block containing a PCI 2.2-compliant 32-bit interface, dual-channel DMA, message unit with I2O support, and programmable interrupt controller.

Its clock architecture uses two independent PLLs: one for the CPU core (350 MHz) and another for peripheral logic (66 MHz PCI, 100 MHz SDRAM), enabling asynchronous operation while maintaining synchronous bus coherency via decoupled address/data paths and store-gathering on PCI writes.

Key Specifications

Pinout & Package

Package: 352-pin TBGA (27 mm × 27 mm, 1.27 mm pitch), RoHS-compliant, designed for high-density PCB layouts with thermal pad grounding and multi-layer board routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC8245LZU350D, MPC8241LZU333D offers reduced power and cost for thermally constrained deployments, while MPC8247LZU350D extends functionality with DDR and USB but sacrifices backward compatibility - making MPC8245LZU350D optimal for legacy SDRAM-based industrial systems requiring long-term supply stability.

Availability

MPC8245LZU350D is available at Aetrix Electronics and suitable for industrial control gateways, telecom line cards, medical imaging subsystems, and ruggedized military terminals requiring stable component supply across extended product lifecycles.

Supply support for MPC8245LZU350D 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) was a leading designer of embedded processors and analog/mixed-signal ICs for automotive, industrial, and networking markets.

The MPC8245LZU350D belongs to Freescale's PowerQUICC™ II family, engineered to deliver high integration and deterministic performance for PCI-based embedded control systems where software compatibility with PowerPC architecture and hardware coherency are critical.

FAQ

What is the maximum supported SDRAM data bus width for the MPC8245LZU350D?

The MPC8245LZU350D supports both 32-bit and 64-bit SDRAM data paths. Its memory controller is configurable for either width, enabling flexible trade-offs between bandwidth and PCB routing complexity. The 64-bit mode delivers up to 1.6 GB/s peak bandwidth at 100 MHz, while 32-bit mode reduces pin count and layout density requirements. Configuration is controlled via memory controller registers and must align with the selected SDRAM device organization (e.g., x8, x16, x32).

Does the MPC8245LZU350D support little-endian operation?

Yes, the MPC8245LZU350D supports selectable big-endian or little-endian operation through the MSR[LE] bit in the Machine State Register. This setting affects byte ordering for load/store instructions, PCI configuration space accesses, and memory-mapped I/O. Endianness is configured at boot time and remains fixed during runtime unless explicitly changed by software - critical for interoperability with little-endian PCI peripherals or legacy firmware stacks.

How does the MPC8245LZU350D handle PCI bus arbitration?

The MPC8245LZU350D implements a PCI bus arbitration unit with five request/grant pairs (REQ/GNT), allowing up to five external PCI masters to share the bus. Arbitration is centralized within the MPC8245LZU350D's peripheral logic block and follows PCI 2.2 fairness rules. The MPC8245LZU350D itself acts as a PCI agent when responding to transactions and as a host when initiating them, with programmable priority and timeout settings managed via internal configuration registers.

Can the MPC8245LZU350D operate with a 5-V PCI bus while using 3.3-V I/O supplies?

Yes, the MPC8245LZU350D is 5.0-V tolerant on PCI pins when LVDD = 5.0 V ± 5%, and OVDD remains at 3.3 V ± 0.3 V. Its PCI I/O buffers meet PCI 2.2 specifications for 5-V signaling, including input voltage limits (0–5.75 V) and overshoot tolerance. However, proper supply sequencing per Figure 2 must be observed: OVDD must stabilize before LVDD, and voltage separation cautions (e.g., LVDD ≤ OVDD + 3.0 V) must be maintained to prevent latch-up.

What debug interfaces are available on the MPC8245LZU350D?

The MPC8245LZU350D provides IEEE Std 1149.1® (JTAG) test access port and COP (Customer On-Chip Debugger) interface for boundary-scan testing, real-time debugging, and in-circuit emulation. JTAG supports instruction/data register access, while COP enables non-intrusive breakpoint insertion, watchpoint-triggered trace capture, and memory attribute signal monitoring. Both interfaces are accessible via dedicated pins (TCK, TMS, TDI, TDO, COPCLK, COPDATA) and require no CPU intervention during operation.