MPC7457EC 데이터 시트보기 (PDF) - Freescale Semiconductor

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MPC7457EC

RISC Microprocessor

Freescale Semiconductor 

Comparison with the MPC7455, MPC7445, MPC7450, MPC7451, and MPC7441

Table 1. Microarchitecture Comparison (continued)

Microarchitectural Specs

MPC7457/MPC7447

MPC7455/MPC7445

Minimum misprediction penalty

6

6

Execution Unit Timings (Latency-Throughput)

Aligned load (integer, float, vector)

Misaligned load (integer, float, vector)

L1 miss, L2 hit latency

SFX (aDd Sub, Shift, Rot, Cmp, logicals)

Integer multiply (32 × 8, 32 × 16, 32 × 32)

Scalar float

VSFX (vector simple)

VCFX (vector complex)

VFPU (vector float)

VPER (vector permute)

3-1, 4-1, 3-1

4-2, 5-2, 4-2

9 data/13 instruction

1-1

3-1, 3-1, 4-2

5-1

1-1

4-1

4-1

2-1

3-1, 4-1, 3-1

4-2, 5-2, 4-2

9 data/13 instruction

1-1

3-1, 3-1, 4-2

5-1

1-1

4-1

4-1

2-1

MMUs

TLBs (instruction and data)

Tablewalk mechanism

Instruction BATs/data BATs

128-entry, 2-way

Hardware + software

8/8

128-entry, 2-way

Hardware + software

8/8

L1 I Cache/D Cache Features

Size

Associativity

Locking granularity

Parity on I cache

Parity on D cache

Number of D cache misses (load/store)

Data stream touch engines

32K/32K

8-way

Way

Word

Byte

5/1

4 streams

32K/32K

8-way

Way

Word

Byte

5/1

4 streams

On-Chip Cache Features

Cache level

Size/associativity

Access width

Number of 32-byte sectors/line

Parity

L2

L2

512-Kbyte/8-way

256-Kbyte/8-way

256 bits

256 bits

2

2

Byte

Byte

Off-Chip Cache Support 1

MPC7450/MPC7451/

MPC7441

6

3-1, 4-1, 3-1

4-2, 5-2, 4-2

9 data/13 instruction

1-1

3-1, 3-1, 4-2

5-1

1-1

4-1

4-1

2-1

128-entry, 2-way

Hardware + software

4/4

32K/32K

8-way

Way

Word

Byte

5/1

4 streams

L2

256-Kbyte/8-way

256 bits

2

Byte

MPC7457 RISC Microprocessor Hardware Specifications, Rev. 8

10

Freescale Semiconductor

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