The MPC8541E integrates a PowerPC™ processor core built on Power Architecture™ technology with system logic required for networking, telecommunications, and wireless infrastructure applications. The MPC8541E is a member of the PowerQUICC™ III family of devices that combine system-level support for industry-standard interfaces with processors that implement the embedded category of the Power Architecture technology. For functional characteristics of the processor, refer to the MPC8555E PowerQUICC™ III Integrated Communications Processor Reference Manual.

Overview

The following section provides a high-level overview of the MPC8541E features. Figure 1 shows the major functional units within the MPC8541E.

Key Features

The following lists an overview of the MPC8541E feature set.

• Embedded e500 Book E-compatible core

— High-performance, 32-bit Book E-enhanced core that implements the PowerPC architecture

— Dual-issue superscalar, 7-stage pipeline design

— 32-Kbyte L1 instruction cache and 32-Kbyte L1 data cache with parity protection

— Lockable L1 caches—entire cache or on a per-line basis

— Separate locking for instructions and data

— Single-precision floating-point operations

— Memory management unit especially designed for embedded applications

— Enhanced hardware and software debug support

— Dynamic power management

— Performance monitor facility

• Security Engine is optimized to handle all the algorithms associated with IPSec, SSL/TLS, SRTP, IEEE Std 802.11i™, iSCSI, and IKE processing. The Security Engine contains 4 Crypto-channels, a Controller, and a set of crypto Execution Units (EUs). The Execution Units are:

— Public Key Execution Unit (PKEU) supporting the following:

– RSA and Diffie-Hellman

– Programmable field size up to 2048-bits

– Elliptic curve cryptography

– F2m and F(p) modes

– Programmable field size up to 511-bits

— Data Encryption Standard Execution Unit (DEU)

– DES, 3DES

– Two key (K1, K2) or Three Key (K1, K2, K3)

– ECB and CBC modes for both DES and 3DES

— Advanced Encryption Standard Unit (AESU)

– Implements the Rinjdael symmetric key cipher

– Key lengths of 128, 192, and 256 bits.Two key

– ECB, CBC, CCM, and Counter modes

— ARC Four execution unit (AFEU)

– Implements a stream cipher compatible with the RC4 algorithm

– 40- to 128-bit programmable key

— Message Digest Execution Unit (MDEU)

– SHA with 160-bit or 256-bit message digest

– MD5 with 128-bit message digest

– HMAC with either algorithm

— Random Number Generator (RNG)

— 4 Crypto-channels, each supporting multi-command descriptor chains

– Static and/or dynamic assignment of crypto-execution units via an integrated controller

– Buffer size of 256 Bytes for each execution unit, with flow control for large data sizes

• High-performance RISC CPM

— Two full-duplex fast communications controllers (FCCs) that support the following protocol:

– IEEE Std 802.3™/Fast Ethernet (10/100)

— Serial peripheral interface (SPI) support for master or slave

— I2C bus controller

— General-purpose parallel ports—16 parallel I/O lines with interrupt capability

• 256 Kbytes of on-chip memory

— Can act as a 256-Kbyte level-2 cache

— Can act as a 256-Kbyte or two 128-Kbyte memory-mapped SRAM arrays

— Can be partitioned into 128-Kbyte L2 cache plus 128-Kbyte SRAM

— Full ECC support on 64-bit boundary in both cache and SRAM modes

— SRAM operation supports relocation and is byte-accessible

— Cache mode supports instruction caching, data caching, or both

— External masters can force data to be allocated into the cache through programmed memory ranges or special transaction types (stashing).

— Eight-way set-associative cache organization (1024 sets of 32-byte cache lines)

— Supports locking the entire cache or selected lines

– Individual line locks set and cleared through Book E instructions or by externally mastered transactions

— Global locking and flash clearing done through writes to L2 configuration registers

— Instruction and data locks can be flash cleared separately

— Read and write buffering for internal bus accesses (Continue....)