MPC180 查看數據表（PDF） - Motorola => Freescale

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产品描述 (功能)

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MPC180

MPC180 Security Processor

Motorola => Freescale 

Public Key Execution Unit (PKEU)

DMA Request

INPUT

4K bit

FIFO

DMA

Logic

8xx/6xx

I/F

(Slave)

Controller

RSA

ECC

SHA-1

MD 5

DES/

3DES

ARC4

RNG

DMA Request

OUTPUT

4K bit DMA

FIFO Logic

Figure 5-1. MPC180 Block Diagram

The interrupt controller organizes hardware interrupts coming from individual EUs into a single maskable

interrupt, IRQ_B, for the host processor. Multiple internal interrupt sources are logically ORed to create a

single, non-prioritized interrupt for the host processor. The controller lets the host read the unmasked

interrupt source status as well as the request status of masked interrupt sources, thereby indicating whether

a given unmasked interrupt source will generate an interrupt request to the host processor.

6 Execution Units (EU)

The execution units (EU) are the actual processing engines that implement the most common industry

algorithms for cryptographic processing. The MPC180 has five execution units, each described below.

6.1 Public Key Execution Unit (PKEU)

The PKEU is capable of performing many advanced mathematical functions to support RSA and

Diffie-Hellman as well as ECC in both F 2 m (polynomial-basis) and F p. The accelerator supports all levels

of functions to assist the host microprocessor in performing its desired cryptographic function. For example,

at the highest level, the accelerator performs modular exponentiations to support RSA and point multiplies

to support ECC. At lower levels, the PKEU can perform simple operations such as modular multiplies.

6.2 Data Encryption Standard Execution Unit (DEU)

The DEU is used for bulk data encryption. It can also execute the Triple-DES algorithm, which is based on

DES. The host processor supplies data to the DEU as input, and this data is encrypted and made available

for reading. The session key is input to the DEU prior to encryption. The DEU computes the data encryption

standard algorithm (ANSI X3.92) for bulk data encryption and decryption.

DES is a block cipher that uses a 56-bit key to encrypt 64-bit blocks of data, one block at a time. DES is a

symmetric algorithm; therefore, each of the two communicating parties share the same 56-bit key. DES

processing begins after this shared session key is agreed upon. The message to be encrypted (typically plain

text) is partitioned into n sets of 64-bit blocks. Each block is processed, in turn, by the DES engine,

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MPC180 Security Processor Technical Summary

MOTOROLA

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