MPC8255ACZUMIBB

Overview

The MPC8255ACZUMIBB is a PowerQUICC II integrated communications processor based on the HiP4 (MPC826xA) family. It utilizes a dual-issue EC603e core with a floating-point unit, operating at frequencies up to 300 MHz. The device features separate 16-Kbyte instruction and data caches, a 32-Kbyte dual-port RAM for the Communications Processor Module (CPM), and supports 60x and local buses. Key interfaces include Ethernet via MII, UTOPIA ports, SCCs, SMCs, SPI, I2C, and TDM controllers.

Feature Summary

• Dual-issue integer core with floating-point unit and MMU
• Integrated Communications Processor Module with 32-Kbyte dual-port RAM
• Support for Ethernet, ATM, HDLC, and various serial protocols
• Separate power supplies for internal logic and I/O

Applications

• Telecommunications infrastructure equipment
• Network routers and switches
• ATM network nodes
• Industrial control systems requiring high-speed serial communication

Procurement Notes

Verify the specific suffix 'IBB' against official NXP documentation, as standard listings often use 'HBB'. Confirm RoHS compliance status, as some variants in this family are non-compliant. Check for end-of-life notifications or product change notices affecting availability. Ensure voltage requirements match the target system design.

Selection Notes

Select this component for applications requiring high-performance RISC processing combined with dedicated hardware protocol handling. The CPM offloads complex serial tasks from the main core. Consider thermal management due to power dissipation at higher clock speeds. Verify interface compatibility with existing bus architectures.

Part Context

This part belongs to the MPC82xx series of PowerQUICC II processors designed by Freescale Semiconductor (now NXP). These devices are optimized for communications applications, offering a balance of CPU performance and specialized peripheral integration for networking protocols.

Replacement Considerations

Consult the MPC8260A datasheet for compatible family members such as the MPC8250 or MPC8260. Verify pinout and feature set compatibility before substitution. Note that newer generations may require architectural changes.