NXP Semiconductors MPC8245LZU333D

Overview

MPC8245LZU333D from Freescale Semiconductor is a 32-bit PowerPC™ MPC603e-based integrated processor combining a superscalar CPU core with PCI bridge, SDRAM memory controller, dual UARTs, DMA, I²C, and interrupt controllers in a single TBGA package. It operates at up to 333 MHz CPU frequency, supports 66 MHz PCI bus, and delivers embedded system-level integration for telecom infrastructure, industrial control, and network edge devices.

For engineers reviewing the MPC8245LZU333D datasheet, MPC8245LZU333D pinout, MPC8245LZU333D application, or MPC8245LZU333D equivalent, key selection considerations include its 333 MHz CPU speed, 32-bit/64-bit PCI 2.2 compliance, 1.9–2.2 V core supply requirement, integrated memory coherency support, and dual-PLL clock architecture enabling independent CPU/peripheral logic frequency scaling.

Technical Context

The MPC8245LZU333D implements a decoupled 64-bit peripheral logic bus interfacing a full-featured MPC603e core (16 KB instruction cache, 16 KB data cache, FPU, MMU) with a PCI bridge, SDRAM controller, and I/O peripherals. Its dual-PLL architecture allows asynchronous operation: one PLL clocks the CPU core, another drives peripheral logic and memory interfaces.

It supports selectable big/little-endian operation, hardware-enforced cache coherency, store-gathering for PCI writes, memory prefetching on PCI reads, and programmable power management modes (nap, doze, sleep). The device integrates five hardware IRQs, 16 serial interrupts, two timers with cascade, and JTAG/COP debug interface with watchpoint capability.

Key Specifications

Pinout & Package

Package: 352-pin Tape Ball Grid Array (TBGA), 27 mm × 27 mm, 1.27 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC8245LZU333D, MPC8241LZU333D removes I²C and message unit functionality to lower cost and die size, while MPC8247LZU333D adds crypto acceleration without altering CPU performance or memory subsystem - making MPC8245LZU333D the optimal balance of integration, cost, and legacy compatibility for non-secure industrial and telecom deployments.

Availability

MPC8245LZU333D is available at Aetrix Electronics and suitable for telecom line cards, industrial PLC controllers, network edge routers, and medical imaging subsystems requiring stable component supply across extended product lifecycles.

Supply support for MPC8245LZU333D 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, analog, and connectivity solutions for automotive, industrial, and networking markets.

The MPC8245LZU333D belongs to Freescale's PowerQUICC™ II family, designed specifically for cost-sensitive, high-integration embedded control applications requiring PCI bridging, real-time processing, and memory subsystem flexibility without external northbridge logic.

FAQ

What is the maximum supported SDRAM capacity for the MPC8245LZU333D?

The MPC8245LZU333D supports up to 2 GB of SDRAM memory across one to eight banks using 16-, 64-, 128-, 256-, or 512-Mbit devices. Its memory controller provides programmable timing, ECC or parity protection, and 32-/64-bit data-path flexibility - enabling direct connection to standard DDR/SDR SDRAM modules without glue logic. This capacity is sufficient for full-featured telecom protocol stacks and real-time OS environments.

Does the MPC8245LZU333D support both big-endian and little-endian operation?

Yes, the MPC8245LZU333D supports selectable big-endian or little-endian operation via configuration registers accessible through the PCI interface or internal control logic. This mode is set at boot time and affects data ordering in memory-mapped I/O, PCI configuration space accesses, and instruction fetch alignment. The MPC8245LZU333D maintains full functional equivalence in either mode, with no performance penalty or architectural limitation.

What are the power management modes available on the MPC8245LZU333D?

The MPC8245LZU333D implements three dynamic power management modes: nap (core clock gated, peripherals active), doze (core and peripheral clocks gated, PLLs active), and sleep (all clocks stopped, PLLs disabled, minimum leakage current). At 333 MHz, typical power drops from 2.3 W (active) to 1.5 W (doze) and 0.3 W (sleep). These modes are controlled via MSR[WE] bit and require specific sequence of HRST_CPU assertion per Section 4.3 of the hardware spec.

Can the MPC8245LZU333D operate as both PCI host and PCI agent?

Yes, the MPC8245LZU333D is designed to function as either a PCI host controller (initiating transactions to other PCI devices) or a PCI agent (responding to transactions from a host). Its PCI interface includes dual address cycle (DAC) support for 64-bit addressing in master mode, inbound/outbound address translation units (ATUs), and full configuration space access - enabling flexible topology deployment in backplane-based systems like modular routers or industrial chassis.

What is the purpose of the DLL_EXTEND bit in the MPC8245LZU333D PMC2 register?

The DLL_EXTEND bit (bit 7 of PMC2 register at offset 0x72) extends the delay-locked loop (DLL) locking range for SDRAM clock synchronization. When disabled (default), the DLL locks within a narrow frequency window defined in Figure 7; when enabled, it expands the lockable range to accommodate wider SDRAM_SYNC_IN jitter or board trace length variations. This setting directly impacts SDRAM setup/hold margin and must be validated per AN2164 for each board layout.