In The Unicode Standard, Sundanese script implementation is discussed in  Chapter 17 Indonesia and Oceania.

The Sundanese script was encoded in The Unicode Standard version 5.1. The script is now encoded in the following blocks:

BlocksCharacter RangeAdded in Unicode VersionUnicode Chart
Sundanese 1B80..1BBF 5.1  U1B80.pdf
Sundanese Supplement 1CC0..1CCF 6.1  U1CC0.pdf

Subsequent to version 5.1, the following characters have been added to the Sundanese script:

CharactersUnicode VersionDocumentation
1BAB..1BAD 6.1  n3666.pdf/ L2/09-251
1BBA..1BAF 6.1  n3666.pdf/ L2/09-251
1CC0..1CC7 6.1  n3666.pdf/ L2/09-251

Documentation refers to  ISO Working Group and Unicode proposals

A number of proposals for its inclusion have been submitted to the Unicode Technical Committee and WG2:

2006-01-09 Proposal for encoding the Sundanese script in the BMP of the UCS — Michael Everson ( WG2 N3022,  L2/06-002)

2009-05-05 Preliminary proposal for encoding additional Sundanese characters for Old Sundanese in the UCS — Michael Everson ( WG2 N3648,  L2/09-190)

2009-09-05 Proposal for encoding additional Sundanese characters for Old Sundanese in the UCS — Michael Everson ( WG2 N3666,  L2/09-251)

2010-04-23 Correction to 3 character names in the Sundanese Supplement block — Deborah Anderson ( WG2 N3836,  L2/10-143)

2014-01-27 Fixing the properties of two Sundanese characters — Andrew C West ( L2/14-034)