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XC7445B Datasheet

  • XC7445B

  • RISC Microprocessor Hardware Specifications

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  • 64页

  • FREESCALE

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Freescale Semiconductor
Technical Data
MPC7455EC
Rev. 4.1, 02/2005
MPC7455
RISC Microprocessor
Hardware Specifications
The MPC7455 and MPC7445 are implementations of the
PowerPC鈩?microprocessor family of reduced instruction set
computer (RISC) microprocessors. This document is primarily
concerned with the MPC7455; however, unless otherwise noted,
all information here also applies to the MPC7445. This document
describes pertinent electrical and physical characteristics of the
MPC7455. For functional characteristics of the processor, refer to
the
MPC7450 RISC Microprocessor Family User鈥檚 Manual.
To
locate any published updates for this document, refer to the
website at http://www.freescale.com.
Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Comparison with the MPC7400, MPC7410,
MPC7450, MPC7451, and MPC7441 . . . . . . . . . . . . . 7
General Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical and Thermal Characteristics . . . . . . . . . . . 10
Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Pinout Listings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Package Description . . . . . . . . . . . . . . . . . . . . . . . . . 41
System Design Information . . . . . . . . . . . . . . . . . . . 45
Document Revision History . . . . . . . . . . . . . . . . . . . 59
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . 60
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1
Overview
The MPC7455 is the third implementation of the fourth generation
(G4) microprocessors from Freescale. The MPC7455 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.
漏 Freescale Semiconductor, Inc., 2005. All rights reserved.

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