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Compact Flash for CoolRunner™-II CPLDs

Compact Flash for CoolRunner™-II CPLDs. Agenda. Introduction What is Compact Flash? CoolRunner-II Implementation Block Diagram Applications CoolRunner-II features and Compact Flash Summary. Introduction. Extension of PCMCIA (PC Card) specification

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Compact Flash for CoolRunner™-II CPLDs

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  1. Compact Flash for CoolRunner™-II CPLDs

  2. Agenda • Introduction • What is Compact Flash? • CoolRunner-II Implementation • Block Diagram • Applications • CoolRunner-II features and Compact Flash • Summary

  3. Introduction • Extension of PCMCIA (PC Card) specification • Compact Flash is intended for a new class of light weight, low power portable devices • Compact Flash concept • Capture,retain and transport data, audio and images • Extended operation beyond memory storage • I/O devices • Magnetic disk data storage • Matchbook sized form factor • Type I (3.3 mm thick) • Type II (5.0 mm thick)

  4. Compact Flash Overview • Host Bus Adapter (HBA) • Interface between host and CF card • Host bus independent • 8/16 bit data access • Can access these card functions: • Memory • Attribute Memory • Common Memory • I/O Space • True IDE Mode

  5. Compact Flash Overview • Two types of Compact Flash cards • Compact Flash • Memory • I/O Space • True IDE Mode (required) • ATA Compliant • CF+ • Memory • I/O Space • True IDE Mode (optional) • ATA Compliant

  6. Compact Flash Overview • Data Bus • 8 bit HBA data bus • 16 bit HBA data bus • I/O Space • 8 bit registers • 16 bit registers • Can have multiple I/O functions • 5V or 3.3V

  7. Attribute Memory • Card Information Structure (CIS) • Base address of 0x000 • Stored in non-volatile memory • Configuration and Status Registers • Base address of 0x200 for Compact Flash cards • Base address is specified in CIS for CF+ cards • Configuration Option Register (Mandatory) • BASE + 0x00 • Enables I/O functions • Address decoding • IRQ type and status • Soft reset

  8. Attribute Memory • Card Configuration and Status Register (Optional) • BASE + 0x02 • Status change indication and reporting • 8/16 bit I/O mode selection • Power level selection (Level 0 or Level 1) • Binary audio enable • Power down control for power conservation • Interrupt pending status • Pin Replacement Register (Optional) • BASE + 0x04 • Reports status change events • I/O Space mode replaces status change pins with other I/O specific signals

  9. Attribute Memory • Socket and Copy Register (Optional) • BASE + 0x06 • Drive number • Socket number (ignored by CF cards) • I/O Base Registers 0,1 (Optional) • BASE + 0x10, BASE + 0x12, etc. • Specify base address of I/O specific function registers • Can place I/O registers anywhere in the host system’s I/O space • Up to 16 bits for each base address • Required for multiple function CF+ cards • Optional for single function CF+ cards

  10. Attribute Memory • I/O Limit Register (Optional) • BASE + 0x18 • Specifies max range of I/O addresses that can be mapped beginning at the base address • Optional

  11. Common Memory • Flash Memory for general storage • Working memory space typically used to map memory arrays • CF cards only have 11 address lines • 2k bytes of addressable common memory

  12. I/O Space • May be one or more functions • Memory only • I/O Cards • Multifunction Cards with combinations of memory and I/O functions • Examples of I/O functions • GPS • Network • Modem • I/O Space re-maps some pins for new functions • Pin Replacement Register has status of memory only pins during I/O configuration • Card powers up as a memory card for HBA to read the CIS data • Card is subsequently configured as I/O function

  13. True IDE Mode • Mandatory for Compact Flash cards • Optional for CF+ cards • Large amounts of memory • Disk Drives • Emulated Disk Drives using Flash memory • Card must include an ATA Host Adapter • No drivers needed on host since ATA is standard • IBM Microdrive • Not included with CoolRunner-II implementation

  14. CoolRunner-II Implementation • CF+ card • Does not support True IDE Mode • Attribute Memory • CIS as ROM within CPLD using product terms • Configuration Option Register (COR) • Card Configuration and Status Register (CSR) • Pin Replacement Register (PRR) • Common Memory • Intel StrataFlash 28F128J3 • 16 bit data bus

  15. CoolRunner-II Implementation • I/O Space interface • Analog Devices DSP Microcomputer ADSP-218xN • 8 bit bus, easily modified to 16 bits • 80 MHz clock to CPLD from DSP CLKOUT • DSP used in Full Memory Mode using I/O Space • 3 wait states for I/O Space bus cycles • I/O Space Registers • Address Register (R/W) • Data Register (R/W) • Status Register (Read Only) • /IOMS for chip select

  16. CF+ Card Block Diagram

  17. CPLD Block Diagram

  18. GPS Network interface Bluetooth Modem MP3 Data Storage Disk drive Flash memory Digital Camera Cell Phone Hand held games Home video game consoles Non-volatile memory Voice Recorders CF+ Applications

  19. Perfect for CoolRunner-II CPLDs • CoolRunner-II CPLDs have 3.3V I/O capability • Compact Flash sockets can be either 5.0V or 3.3V • Cards are checked for voltage capabilities • 5.0V will never reach the I/Os • CoolRunner-II Schmitt Triggers are used as required by the Compact Flash Specification • CoolRunner-II DualEDGE registers • For use with a slow clock and meet CF timing specifications • Ultra low power conserves battery life • Low heat generation ideal for small form factor cards

  20. Summary • Compact Flash is used for: • Portable, low power devices • Memory storage • I/O functions • CoolRunner-II CPLDs fit the role • Low power • Schmitt Triggers • DualEDGE • 3.3V I/O drive

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