MPC7450EC datasheet(7/52 Pages) MOTOROLA

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MPC7450 RISC Microprocessor Hardware Speciﬁcations

Comparison with the MPC7400

The system can then disable the SYSCLK source for greater system power savings.

Power-on reset procedures for restarting and relocking the PLL must be followed on

exiting the deep sleep state.

— Thermal management facility provides software-controllable thermal management. Thermal

management is performed through the use of three supervisor-level registers and an

MPC7451-speciﬁc thermal management exception.

— Instruction cache throttling provides control of instruction fetching to limit power

consumption.

•

Performance monitor can be used to help debug system designs and improve software efﬁciency.

•

In-system testability and debugging features through JTAG boundary-scan capability

•

Testability

— LSSD scan design

— IEEE 1149.1 JTAG interface

— Array built-in self test (ABIST)—factory test only

•

Reliability and serviceability

— Parity checking on system bus and L3 cache bus

— Parity checking on L1, L2, and L3 cache arrays

1.3

Comparison with the MPC7400

Table 1 compares the key features of the MPC7450 with the key features of the earlier MPC7400. To achieve

a higher frequency, the number of logic levels per cycle is reduced. Also, to achieve this higher frequency,

the pipeline of the MPC7450 is extended (compared to the MPC7400), while maintaining the same level of

performance as measured by the number of instructions executed per cycle (IPC).

Table 1. Microarchitecture Comparison

Microarchitectural Specs

MPC7450

MPC7400/MPC7410

Basic Pipeline Functions

Logic Inversions per Cycle

Pipeline Stages up to Execute

Total Pipeline Stages (Minimum)

Pipeline Maximum Instruction Throughput

3 + Branch

2 + Branch

Pipeline Resources

Instruction Buffer Size

Completion Buffer Size

Renames (Integer, Float, Vector)

16, 16, 16

6, 6, 6

Maximum Execution Throughput

SFX

Vector

2 (Any 2 of 4 Units)

2 (Permute/Fixed)

Scalar Floating-Point

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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