https://www.trustedcomputinggroup.org/community/2015/12/tcg_tpm_20_library_specification_now_available_from_iso_and_the_iec
http://www.trustedcomputinggroup.org/resources/tpm_library_specification
http://www.trustedcomputinggroup.org/resources/errata_for_tpm_library_specification_20
TPM is now an ISO standard.
Hurray, now I get to pay to access them from ISO. 🙂
TCG’s current specs are for members-only, not the public.
I hope TCG keeps the public specs on their site freely-available.