參數(shù)資料
型號(hào)： MPC7450RX667LX
廠商： MOTOROLA INC
元件分類(lèi)： 微控制器/微處理器
英文描述： 32-BIT, 667 MHz, RISC PROCESSOR, CBGA483
封裝： 29 X 29 MM, 3.22 MM HEIGHT, 1.27 MM PITCH, CERAMIC, BGA-483
文件頁(yè)數(shù)： 59/60頁(yè)
文件大?。?/td> 1296K
代理商： MPC7450RX667LX
8
MPC7450 RISC Microprocessor Hardware Specifications
Comparison with the MPC7400
Reliability and serviceability
— Parity checking on MPX bus and L3 cache buses
— 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
18
28
Pipeline Stages up to Execute
5
3
Total Pipeline Stages (Minimum)
7
4
Pipeline Maximum Instruction Throughput
3 + Branch
2 + Branch
Pipeline Resources
Instruction Buffer Size
12
6
Completion Buffer Size
16
8
Renames (Integer, Float, Vector)
16, 16, 16
6, 6, 6
Maximum Execution Throughput
SFX
3
2
Vector
2 (Any 2 of 4 Units)
2 (Permute/Fixed)
Scalar Floating-Point
1
Out-of-Order Window Size in Execution Queues
SFX Integer Units
1 Entry
× 3 Queues
1 Entry
× 2 Queues
Vector Units
In Order, 4 Queues
In Order, 2 Queues
Scalar Floating-Point Unit
In Order
Branch Processing Resources
Prediction Structures
BTIC, BHT, Link Stack
BTIC, BHT
BTIC Size, Associativity
128-Entry, 4-Way
64-Entry, 4-Way
BHT Size
2K-Entry
512-Entry
Link Stack Depth
8
None
Unresolved Branches Supported
3
2
Branch Taken Penalty (BTIC Hit)
1
0
Minimum Misprediction Penalty
6
4
Execution Unit Timings (Latency-Throughput)
Aligned Load (Integer, Float, Vector)
3-1, 4-1, 3-1
2-1, 2-1, 2-1
Misaligned Load (Integer, Float, Vector)
4-2, 5-2, 4-2
3-2, 3-2, 3-2
L1 Miss, L2 Hit Latency
6 (9)
9 (11)1
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