Total size of OTP bits requirements

[DerekWangScaleflux]

Hi Caliptra team,
What's the total size of Caliptra 2.0 subsystem OTP ?
From the information in https://github.com/chipsalliance/caliptra-ss/blob/main/src/fuse_ctrl/doc/otp_ctrl_field_descriptions.md

 Total size is about 2074 byte.( Without Vendor Specific, it is about 1562 byte )

 This OTP size is huge.
 Is this version the final one ? Are these bits all mandatory ?

Best Regards
Derek Wang

[nileshbpat]

Yes default size is 2074 bytes. However, by reducing the parameters from memory map it could be reduced. please find below documentation for more details.

Link to fuse memory map is at otp_ctrl_mmap.md

Documentation at below link provide details on how to reduce the size.
Generating the fuse partitions

[DerekWangScaleflux]

Yes default size is 2074 bytes. However, by reducing the parameters from memory map it could be reduced. please find below documentation for more details.

Link to fuse memory map is at otp_ctrl_mmap.md

Documentation at below link provide details on how to reduce the size. Generating the fuse partitions

Thanks a lot for the reply. We will investigate the steps mentioned.

Is there some guideline to the OTP fields, like which ones are manatory and which ones could be reduced , from application point of view ?

So we could have a roughly estimation on how big the OTP macro we need.

Best Regards
Derek Wang

[ekarabu]

Resolved with #483. Please see this documentation update (3ec2497) and fuse map update (d9a7fe4).