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AR# 2091

Running makebits with the default options targeting a 4000E or a 5200 device from XDE, XDM, or command line results in different bitstream for each run

説明

Key Words: default, makebits, options, 4000e, 5200

Urgency: Standard

General Description:
If you run makebits with the default options targeting a 4000E or a 5200 device from within XDE, XDM or via the command line you will get slightly different bitstream for each run.

If you run makebits in XDE targeting a 4KE or a 5200 device with the default options:

1. The bitstream will cause the I/Os to have TTL inputs and outputs.
2. The bitstream will be aligned to done.

If you run makebits from a commmand line targetting a 4KE or a 5200 device with default options:

1. The bistream will cause the I/Os to have CMOS inputs and outputs.
2. The bitstream will be aligned to lengthcount.

If you run makebits from XDM (Xilinx Design Manager) targeting a 4KE device with default options:

1. The bistream will cause the I/Os to have CMOS inputs and outputs.
2. The bitstream will be aligned to done.

If you run makebits from XDM (Xilinx Design Manager) targeting a 5200 device with default options:

1. The bistream will cause the I/Os to have CMOS inputs and outputs.
2. The bitstream will be aligned to length count.

ソリューション

1

In XDE if you run makebits targeting a 4KE device with the default options:
- It will output a bitstream with TTL inputs and outputs.
- It will also be aligned to done.

On the command line with default options, the resulting bitstream will have CMOS inputs and outputs, and be aligned to length count.

In XDM, it defaults to CMOS inputs and outputs, but is aligned to done.

To get the same bitstream you must run makebits with the same exact options. Check the ".mbo" file for a list of options, but be careful not all options are listed always. (i.e., align to length count and aligne to done).

2

In XDE, if you run makebits targeting a 5200 device with the default options:
- It will output a bitstream with TTL inputs and outputs.
- It will also be aligned to done.

On the command line with default options, the resulting bitstream will have CMOS inputs and outputs, and be aligned to length count.

In XDM, it defaults to CMOS inputs and outputs, but is aligned to length count.

To get the same bitstream you must run makebits with the same exact options. Check the ".mbo" file for a list of options, but be careful not all options are listed always. (i.e., align to length count and align to done).
AR# 2091
作成日 08/31/2007
最終更新日 09/30/2005
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