KMC7457VG1267LC Freescale Semiconductor, KMC7457VG1267LC Datasheet - Page 8

• Manufacturer Part Number: KMC7457VG1267LC
• Description: IC MPU RISC 32BIT 1267MHZ 483BGA
• Manufacturer: Freescale Semiconductor

Specifications of KMC7457VG1267LC

• Processor Type: MPC74xx PowerPC 32-Bit
• Speed: 1.267GHz
• Voltage: 1.3V
• Mounting Type: Surface Mount
• Package / Case: 483-FCCBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

Comparison with the MPC7455, MPC7445, MPC7450, MPC7451, and MPC7441
3
Table 1
MPC7445, MPC7450, MPC7451, and MPC7441. To achieve a higher frequency, the number of logic
levels per cycle is reduced. Also, to achieve this higher frequency, the pipeline of the MPC7457 is
extended (compared to the MPC7400), while maintaining the same level of performance as measured by
the number of instructions executed per cycle (IPC).
8
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
SFX integer units
Vector units
Scalar floating-point unit
Prediction structures
BTIC size, associativity
BHT size
Link stack depth
Unresolved branches supported
Branch taken penalty (BTIC hit)
Comparison with the MPC7455, MPC7445, MPC7450,
MPC7451, and MPC7441
Microarchitectural Specs
compares the key features of the MPC7457 with the key features of the earlier MPC7455,
MPC7457 RISC Microprocessor Hardware Specifications, Rev. 7
Out-of-Order Window Size in Execution Queues
Table 1. Microarchitecture Comparison
Maximum Execution Throughput
Branch Processing Resources
BTIC, BHT, link stack
MPC7457/MPC7447
1 entry × 3 queues
2 (any 2 of 4 units)
In order, 4 queues
Basic Pipeline Functions
128-entry, 4-way
Pipeline Resources
3 + Branch
16, 16, 16
2K-entry
In order
18
12
16
5
7
3
1
8
3
1
BTIC, BHT, link stack
MPC7455/MPC7445
1 entry × 3 queues
2 (any 2 of 4 units)
In order, 4 queues
128-entry, 4-way
3 + Branch
16, 16, 16
2K-entry
In order
18
12
16
5
7
3
1
8
3
1
Freescale Semiconductor
MPC7450/MPC7451/
BTIC, BHT, link stack
1 entry × 3 queues
2 (any 2 of 4 units)
In order, 4 queues
128-entry, 4-way
3 + Branch
MPC7441
16, 16, 16
2K-entry
In order
12
16
18
5
7
3
1
8
3
1