MPC7448 datasheet(8/60 Pages) FREESCALE

8 / 60 page

MPC7448 RISC Microprocessor Hardware Specifications, Rev. 4

Freescale Semiconductor

Comparison with the MPC7447A, MPC7447, MPC7445, and MPC7441

Execution Unit Timings (Latency-Throughput)

Aligned load (integer, float, vector)

3-1, 4-1, 3-1

Misaligned load (integer, float, vector)

4-2, 5-2, 4-2

L1 miss, L2 hit latency with ECC (data/instruction)

12/16

—

L1 miss, L2 hit latency without ECC (data/instruction)

11/15

9/13

SFX (add, sub, shift, rot, cmp, logicals)

1-1

Integer multiply (32

× 8, 32 × 16, 32 × 32)

4-1, 4-1, 5-2

Scalar float

5-1

VSFX (vector simple)

1-1

VCFX (vector complex)

4-1

VFPU (vector float)

4-1

VPER (vector permute)

2-1

MMUs

TLBs (instruction and data)

128-entry, 2-way

Tablewalk mechanism

Hardware + software

Instruction BATs/data BATs

8/8

4/4

L1 I Cache/D Cache Features

Size

32K/32K

Associativity

8-way

Locking granularity

Way

Parity on I cache

Word

Parity on D cache

Byte

Number of D cache misses (load/store)

5/2

5/1

Data stream touch engines

4 streams

On-Chip Cache Features

Cache level

Size/associativity

1-Mbyte/

8-way

512-Kbyte/8-way

256-Kbyte/8-way

Access width

256 bits

Number of 32-byte sectors/line

Parity tag

Byte

Parity data

Byte

Data ECC

64-bit

—

Thermal Control

Dynamic frequency switching divide-by-two mode

Yes

Dynamic frequency switching divide-by-four mode

Yes

Thermal diode

Yes

Table 1. Microarchitecture Comparison (continued)

Microarchitectural Specs

MPC7448

MPC7447A MPC7447 MPC7445 MPC7441

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