mpc7450 Freescale Semiconductor, Inc, mpc7450 Datasheet - Page 7

• Manufacturer Part Number: mpc7450
• Description: Mpc7450 Risc Microprocessor
• Manufacturer: Freescale Semiconductor, Inc

1.3
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).
MOTOROLA
Logic Inversions per Cycle
Pipeline Stages up to Execute
Total Pipeline Stages (Minimum)
Pipeline Maximum Instruction Throughput
Instruction Buffer Size
Completion Buffer Size
Renames (Integer, Float, Vector)
SFX
Vector
Scalar Floating-Point
•
•
•
•
— Thermal management facility provides software-controllable thermal management. Thermal
— Instruction cache throttling provides control of instruction fetching to limit power
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
Comparison with the MPC7400
management is performed through the use of three supervisor-level registers and an
MPC7451-specific thermal management exception.
consumption.
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.
Microarchitectural Specs
MPC7450 RISC Microprocessor Hardware Specifications
Freescale Semiconductor, Inc.
For More Information On This Product,
Table 1. Microarchitecture Comparison
Maximum Execution Throughput
Go to: www.freescale.com
Basic Pipeline Functions
Pipeline Resources
2 (Any 2 of 4 Units)
3 + Branch
MPC7450
16, 16, 16
18
12
16
5
7
3
1
Comparison with the MPC7400
MPC7400/MPC7410
2 (Permute/Fixed)
2 + Branch
6, 6, 6
28
3
4
6
8
2
1
7