Intel® Quark™ Soc X1000 Core Hardware Reference Manual April 2014 2 Order Number: 329678-002US Revision History—Intel® Quark™ Core
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Intel® Quark™ SoC X1000 Core Hardware Reference Manual April 2014 Order Number: 329678-002US INFORMATIONLegal Lines and Disclaimers IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL PRODUCTS. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT. EXCEPT AS PROVIDED IN INTEL'S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, INTEL ASSUMES NO LIABILITY WHATSOEVER AND INTEL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY, RELATING TO SALE AND/OR USE OF INTEL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. A "Mission Critical Application" is any application in which failure of the Intel Product could result, directly or indirectly, in personal injury or death. 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Processor numbers differentiate features within each processor family, not across different processor families. Go to: http://www.intel.com/products/processor_number/ Code Names are only for use by Intel to identify products, platforms, programs, services, etc. (“products”) in development by Intel that have not been made commercially available to the public, i.e., announced, launched or shipped. They are never to be used as “commercial” names for products. Also, they are not intended to function as trademarks. Intel, Quark, and the Intel logo are trademarks of Intel Corporation in the U.S. and/or other countries. *Other names and brands may be claimed as the property of others. Copyright © 2014, Intel Corporation. All rights reserved. Intel® Quark™ SoC X1000 Core Hardware Reference Manual April 2014 2 Order Number: 329678-002US Revision History—Intel® Quark™ Core Revision History Date Revision Description Removed non-relevant Clocking Considerations (formerly Section 9.1). April 2014 002 Updated with trademarked term: Intel® Quark™ Core. September 2013 001 First external release of document. Intel® Quark™ SoC X1000 Core April 2014 Hardware Reference Manual Order Number: 329678-002US 3 Intel® Quark™ Core—Contents Contents 1.0 About this Manual ..................................................................................................... 9 1.1 Manual Contents................................................................................................. 9 1.2 Notational Conventions.......................................................................................10 1.3 Special Terminology ...........................................................................................11 1.4 Related Documents ............................................................................................11 2.0 Introduction ............................................................................................................12 2.1 Intel® Quark™ Core Features ..............................................................................12 2.2 Intel® Quark™ Core Product ...............................................................................14 2.2.1 Operating Modes and Compatibility ...........................................................14 2.2.2 Memory Management..............................................................................14 2.2.3 On-chip Cache........................................................................................14 2.2.4 Floating-Point Unit ..................................................................................15 2.3 System Components ..........................................................................................15 2.4 System Architecture...........................................................................................15 2.5 Systems Applications .........................................................................................16 2.5.1 Embedded Personal Computers.................................................................16 2.5.2 Embedded Controllers .............................................................................17 3.0 Internal Architecture ...............................................................................................18 3.1 Instruction Pipelining..........................................................................................21 3.2 Bus Interface Unit..............................................................................................21 3.2.1 Data Transfers .......................................................................................22 3.2.2 Write Buffers..........................................................................................22 3.2.3 Locked Cycles ........................................................................................23 3.2.4 I/O Transfers .........................................................................................23 3.3 Cache Unit........................................................................................................24 3.3.1 Cache Structure .....................................................................................24 3.3.2 Cache Updating ......................................................................................25 3.3.3 Cache Replacement.................................................................................26 3.3.4 Cache Configuration................................................................................26 3.4 Instruction Prefetch Unit .....................................................................................27 3.5 Instruction Decode Unit ......................................................................................27 3.6 Control Unit ......................................................................................................28 3.7 Integer (Datapath) Unit ......................................................................................28 3.8 Floating-Point Unit .............................................................................................28 3.8.1 Intel® Quark™ Core Floating-Point Unit .....................................................28 3.9 Segmentation Unit .............................................................................................28 3.10 Paging Unit .......................................................................................................29 4.0 Bus Operation ..........................................................................................................31 4.1 Data Transfer Mechanism ...................................................................................31 4.1.1 Memory and I/O Spaces ..........................................................................31 4.1.1.1 Memory and I/O Space Organization............................................32 4.1.2 Dynamic Data Bus Sizing .........................................................................33 4.1.3 Interfacing with 8-, 16-, and 32-Bit Memories.............................................34 4.1.4 Dynamic Bus Sizing During Cache Line Fills ................................................38 4.1.5 Operand Alignment .................................................................................39 4.2 Bus Arbitration Logic ..........................................................................................40 4.3 Bus Functional Description ..................................................................................43 4.3.1 Non-Cacheable Non-Burst Single Cycle ......................................................43 4.3.1.1 No Wait States..........................................................................43 4.3.1.2 Inserting