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Atmel AT91 ARM Application Note
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Atmel AT91 ARM Application Note

Atmel AT91 ARM Application Note

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Interfacing a Hard Disk Drive to an AT91RM9200
1. Scope
This Application Note describes the AT91RM9200 hardware and software interface
for a hard disk drive. The AT91RM9200 embeds a CompactFlash
can be adapted to support such a peripheral.
1.1
Reference Documents
The following table gives the references of the documents and their denominations in
this Application Note.
Table 1-1.
Reference Document Table
Owner - Reference
Atmel Literature Number 1768
Microcontroller
Denomination
AT91RM9200 Datasheet
AT Attachment Interface Document, American National Standards
Institute, X3.221-1994
AT91 ARM
Thumb
Microcontrollers
®
Glue Logic that
Application Note
®
®
6023B–ATARM–06-Jan-06
1

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Summary of Contents for Atmel AT91 ARM

  • Page 1 The following table gives the references of the documents and their denominations in this Application Note. Table 1-1. Reference Document Table Owner - Reference Denomination Atmel Literature Number 1768 AT91RM9200 Datasheet AT Attachment Interface Document, American National Standards Institute, X3.221-1994 6023B–ATARM–06-Jan-06...

  • Page 2: Hardware Interface

    2. Hardware Interface External Bus Interface Signals The External Bus Interface integrates circuitry to interface with CompactFlash devices using Attribute, Memory and I/O modes. Most of these signals can be used to connect a hard disk drive to the AT91RM9200. Note: For a full description of external bus interface signals, refer to the EBI Programmer Datasheet.
  • Page 3 Application Note HDD Application Example Figure 2-1. HDD Application Example AT91RM9200 IDE Connector D[15:0] D[15:0] A25/CFRNW CSEL NCS4/CFCS A[2:0] A[2:0] NWR1/CFIOR _IORD _IOWR NWR3/CFIOW _CS0 PC11 PC12 _CS1 IORDY PC6/NWAIT _RESET 6023B–ATARM–06-Jan-06...

  • Page 4: Software Interface

    3. Software Interface External Bus Interface Signal Handling The EBI CompactFlash Glue Logic integrates a fourth memory space that can be accessed through NCS4 (i.e., between 0x5000 0000 and 0x5FFF FFFF). This memory space, True IDE Mode Space, is intended to access CompactFlash in True IDE Mode (Hard Disk Drive, so).

  • Page 5: Software Example

    Software Example An example HDD driver describing signal management with the AT91 software package can be downloaded from the Atmel web site http://www.atmel.com. 4. Warranty All delivered sources are free of charge and can be copied or modified without authorization.

  • Page 6: Revision History

    5. Revision History Table 5-1. Revision History Document Ref. Comments Change Request 6023A First issue. 6023B Updated referenced documents in Table 1-1, “Reference Document Table,” on page 04-312 Application Note 6023B–ATARM–06-Jan-06...
  • Page 7 Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDI- TIONS OF SALE LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY...

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