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MPC7455

Features: • High-performance, superscalar microprocessor• Eleven independent execution units and three register files• Three issue queues FIQ, VIQ, and GIQ can accept as many as one, two, and three instructions, respectively, in a cycle. Instruction dispatch requires the followin...

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SeekIC No. : 004426074 Detail

MPC7455: Features: • High-performance, superscalar microprocessor• Eleven independent execution units and three register files• Three issue queues FIQ, VIQ, and GIQ can accept as many as on...

MPC7455 Data Sheet

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Part Number:
MPC7455
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

• High-performance, superscalar microprocessor
• Eleven independent execution units and three register files
• Three issue queues FIQ, VIQ, and GIQ can accept as many as one, two, and three instructions, respectively, in a cycle. Instruction dispatch requires the following:
• Rename buffers
• Dispatch unit
• Completion unit
• Separate on-chip L1 instruction and data caches (Harvard architecture)
• Level 2 (L2) cache interface
• Level 3 (L3) cache interface (not implemented on MPC7445)
• Separate memory management units (MMUs) for instructions and data
• Efficient data flow
• Multiprocessing support features include the following:
• Power and thermal management
• 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
• Reliability and serviceability


Specifications

Characteristic

Symbol

Maximum Value

Unit

Notes

Core supply voltage

VDD

0.3 to 1.95

V

4

PLL supply voltage

AVDD

0.3 to 1.95

V

4

Processor bus supply voltage BVSEL = 0

OVDD

0.3 to 1.95

V

3.6

BVSEL =HRESET or OVDD

OVDD

0.3 to 2.7

V

3.7

L3 bus supply voltage L3VSEL = ¬HRESET

GVDD

0.3 to 1.65

V

3.8

L3VSEL = 0

GVDD

0.3 to 1.65

V

3.9

L3VSEL = HRESET or GVDD

GVDD

0.3 to 2.7

V

3.10

Input voltage Processor bus

Vin

0.3 to OVDD + 0.3

V

2.5

L3 bus

Vin

0.3 to GVDD + 0.3

V

2.5

JTAG signals

Vin

0.3 to OVDD + 0.3

V

 

Input voltage Processor bus

Vin

0.3 to OVDD + 0.3

V

2.5

JTAG signals

Vin

0.3 to OVDD + 0.3

V

  



Description

The MPC7455 is the third implementation of the fourth generation (G4) microprocessors from Motorola. It implements the full PowerPC 32-bit architecture and is targeted at networking and computing systems applications. The MPC7455 consists of a processor core, a 256-Kbyte L2, and an internal L3 tag and controller which support a glueless backside L3 cache through a dedicated high-bandwidth interface. The MPC7445 is identical to the MPC7455 except it does not support the L3 cache interface.

Figure 1 shows a block diagram of the MPC7455. The core is a high-performance superscalar design supporting a double-precision floating-point unit and a SIMD multimedia unit. The memory storage subsystem supports the MPX bus interface to main memory and other system resources. The L3 interface supports 1 or 2 Mbytes of external SRAM for L3 cache data.

Note that the MPC7455 is footprint-compatible with the MPC7450 and MPC7451, and the MPC7445 is footprint-compatible with the MPC7441.




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