MPC8255AZUPIBB

Freescale Semiconductor, Inc. Advance Information MPC8255EC/D Rev. 0.4, 5/2002 MPC8255 Hardware Specifications This document contains detailed information on power considerations, DC/AC electrical characteristics, and AC timing specifications for the MPC8255 PowerQUICC II communications processor. The following topics are addressed: Topic Page Section 1.1, Features 2 Section 1.2, Electrical and Thermal Characteristics 5 Section 1.2.1, DC Electrical Characteristics 5 Section 1.2.2, Thermal Characteristics 9 Section 1.2.3, Power Considerations 9 Section 1.2.4, AC Electrical Characteristics 10 Section 1.3, Clock Configuration Modes 16 Section 1.3.1, Local Bus Mode 16 Section 1.4, Pinout 20 Section 1.5, Package Description 33 Section 1.6, Ordering Information 35 PRELIMINARYSUBJECT TO CHANGE WITHOUT NOTICE For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc... Freescale Semiconductor, Inc. Features Figure 1 shows the block diagram for the MPC8255. 16 Kbytes I-Cache I-MMU System Interface Unit (SIU) 60x Bus G2 Core 16 Kbytes Bus Interface Unit D-Cache Local Bus 60x-to-Local D-MMU 32 bits, up to 83 MHz Bridge Memory Controller Communication Processor Module (CPM) Clock Counter Timers 32 Kbytes Serial Interrupt Dual-Port RAM DMAs Controller System Functions Parallel I/O 32-bit RISC Microcontroller 4 Virtual and Program ROM Baud Rate IDMAs Generators 2 MCC2 FCC1 FCC2 SCC1 SCC2 SCC3 SCC4 SMC1 SMC2 SPI I C Time Slot Assigner Serial Interface Non-Multiplexed 2 MII 2 UTOPIA 4 TDM Ports I/O Ports Ports Figure 1. MPC8255 Block Diagram 1.1 Features The major features of the MPC8255 are as follows: Footprint-compatible with the MPC8260 Dual-issue integer core A core version of the EC603e microprocessor System core microprocessor supporting frequencies of 150200 MHz Separate 16-Kbyte data and instruction caches: Four-way set associative Physically addressed LRU replacement algorithm PowerPC architecture-compliant memory management unit (MMU) Common on-chip processor (COP) test interface High-performance (4.45.1 SPEC95 benchmark at 200 MHz 280 Dhrystones MIPS at 200 MHz) Supports bus snooping for data cache coherency Floating-point unit (FPU) MPC8255 Hardware Specifications PRELIMINARYSUBJECT TO CHANGE WITHOUT NOTICE For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc...