System Ace And Compactflash Connector; Zbt Synchronous Sram - Xilinx M401 User Manual

Detailed Description

17. System ACE and CompactFlash Connector

The Xilinx System ACE CompactFlash (CF) configuration controller allows a Type I or
Type II CompactFlash card to program the FPGA through the JTAG port. Both hardware
and software data can be downloaded through the JTAG port. The System ACE controller
supports up to eight configuration images on a single CompactFlash card. The
configuration address switches allow the user to choose which of the eight configuration
images to use.
System ACE error and status LEDs indicate the operational state of the System ACE
controller:
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Every time a CompactFlash card is inserted into the System ACE socket, a configuration
operation is initiated. Pressing the System ACE reset button re-programs the FPGA.
The board also features a System ACE failsafe mode. In this mode, if the System ACE
controller detects a failed configuration attempt, it automatically reboots back to a
predefined configuration image. The failsafe mode is enabled by inserting two jumpers
across J29 and J30 (in horizontal or vertical orientation).
The System ACE MPU port is connected to the FPGA. This connection allows the FPGA to
use the System ACE controller to reconfigure the system or access the CompactFlash card
as a generic FAT file system. The data bus for the System ACE MPU port is shared with the
USB controller.
For configuration through the System ACE controller, the configuration selector switch
(SW12) must be set to the SYS ACE position.

18. ZBT Synchronous SRAM

The ZBT synchronous SRAM (Cypress CY7C1354B or compatible) provides high-speed,
low-latency external memory to the FPGA. The memory is organized as 256K x 36 bits.
This organization provides for a 32-bit data bus with support for four parity bits. On
ML403, the parity bits are not accessible.
Note:
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A blinking red error LED indicates that no CompactFlash card is present
A solid red error LED indicates an error condition during configuration
A blinking green status LED indicates a configuration operation is ongoing
A solid green status LED indicates a successful download
Caution!
Use caution when inserting a CompactFlash card with exposed metallic surfaces.
Improper insertion can cause a short with the traces or components on the board.
The SRAM and FLASH memory share the same data bus.
www.xilinx.com ML401/ML402/ML403 Evaluation Platform
UG080 (v2.5) May 24, 2006
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