Power Up Sequencing

This section details the suggested methods for pin connections and cable operation.

Pin Connection Considerations

The following adjustments will make the process of connecting and downloading easier.

• Provide appropriate pins on your printed circuit board for your device type.
  
  
• Place pins on board so that flying leads can reach them. The flying leads that are shipped with the cable are six inches long. While pins may be a couple inches apart, do not have any two pins more than six inches apart.
  
  
• Keep header pins on your board a minimum of 0.10 inches apart.
  
  

Cable Connection Procedure

The following steps are required for download cable operation.

1. Connect the cable to your host system. Make sure to use the appropriate port and adapter, if necessary.
   
   
2. Connect the cable to your target system or demonstration board. Always power up the host system before the target system. The power for the drivers is derived from the target system.
   
   
3. Connect the cable's GND wire to the corresponding signal on the target board. Next, connect VCC to the +5V on the target board.
   
   
4. Connect the appropriate pins for device configuration.
   
   
5. Power up the target system.
   
   

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   WARNING

   Cable protection ensures that the host system port cannot be damaged through normal cable operation. For increased safety, please check that the power to the host computer is on before the target system is powered up.

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6. Start the appropriate Xilinx software package and configure your device. The JTAG Programmer Software and Hardware Debugger Software will automatically identify the download cables when correctly connected. If you need to set up the cable manually, see the “Setting Up The Cable” section.
   
   

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   NOTE

   The download cables will not operate if the target system`s power is turned off before or during software operations. Make certain that this power connection is on and stable. Your system's power should be on during ISP operations.

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   NOTE

   When powering down, turn off the target demonstration board first, and then the host machine.

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Setting Up The Cable

If you are using the Hardware Debugger Software and a PC as a host system, manually select your cable as follows.

Output > Cable Setup

Select your cable type, then click OK. If you are using the XChecker cable, you may also select a BAUD rate. See “Valid Baud Rates” table.

If you are using the JTAG Programmer software, select the cable manually as follows.

Output > Cable Auto Connect

Select your cable type, then click OK.