1- For old development tools.
You can access then on the web site directly at the link:
CodeWarrior Downloads|Freescale
Under Legacy Updates and Patches you can download all patches for older versions


Example for HCS12 16-bit MCUs v5.0


2- For last/current development tools
As explained in the Legacy Updates and Patches:
If any legacy update/patches are needed for versions not listed below please access your Licensing portal and click on the "Previews tab" after selecting the suite you like to use.
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Under Secure Applications click on Software License and support


Select a registration


Select a Product HC12 v5.1 for instance


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Click on I Agree if the needed and you will have access to all service packs, patches and other updates available for this tool version.
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Attached you will find
- a video showing you the process,
- the information in a word doc.