commonly found in networking and telecommunications applications. Several companies manufacture blades that conform to ATCA, an industry standard platform specification, including this and other similar stand-alone Freescale processors. Section 3.3
examines these platforms.
The MPC7448 has enjoyed popularity in a wide variety of signal-processing and
networking applications because of its advanced feature set:
• Operating clock rates in excess of 1.5GHz
• 1MB onboard L2 cache
• Advanced power-management capabilities, including multiple sleep modes
• Advanced AltiVec vector-execution unit
• Vo l t a g e s c a l i n g f o r r e d u c e d - p o w e r c o n f i g u r a t i o n s
The MPC7448 contains a Freescale technology called AltiVec to enable very fast
algorithmic computations and other data-crunching applications. The AltiVec unit
consists of a register file containing 32 very wide (128-bit) registers. Each value within
one of these AltiVec registers can be considered a vector of multiple elements. AltiVec
defines a set of instructions to manipulate this vector data effectively in parallel with
core CPU instruction processing. AltiVec operations include such computations as
sum-across, multiplysum, simultaneous data distribute (store), and data gather (load)
instructions.
Programmers have used the AltiVec hardware to enable very fast software computa-tions commonly found in signal processing and network elements. Examples include
fast Fourier Transform, digital signal processing such as filtering, MPEG video encoding and decoding, and fast generation of encryption protocols such as DES, MD5, and
SHA1.
Other chips in the Freescale lineup of stand-alone processors include the MPC7410,
MPC7445, MPC7447, MPC745x, and MPC7xx family.
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