There is an old question regarding the use of ST90R158 (ROMless) code in an ST90T158 (OTP) processor. I need some information on a way to accomplish this, if possible.

[Tesla DeLorean]

Perhaps actually cite the question? https://community.st.com/s/question/0D50X00009Xkd3xSAB/its-possible-to-use-st90t158otp-as-rom-less-type-st90r158-help-me

The threads are from about 8 years ago, pointing to off-site documents which are no longer available. Not sure what ST9 App Notes and Design Guides exist. Some of that is probably of the dead-tree variety. Check the book cases of departed colleagues.

[Tesla DeLorean]

APPLICATION NOTE AN1076

ST9 EXTERNAL MEMORY INTERFACE CONFIGURATION

https://www.st.com/content/ccc/resource/technical/document/application_note/e4/09/05/ed/c4/84/47/ef/CD00004082.pdf/files/CD00004082.pdf/jcr:content/translations/en.CD00004082.pdf

https://www.st.com/content/ccc/resource/technical/document/application_note/db/86/d1/27/5d/9a/4f/73/CD00004275.pdf/files/CD00004275.pdf/jcr:content/translations/en.CD00004275.pdf

https://www.st.com/content/ccc/resource/technical/document/user_manual/ef/db/dc/5d/12/5e/40/73/CD00147167.pdf/files/CD00147167.pdf/jcr:content/translations/en.CD00147167.pdf

[Tesla DeLorean]

https://www.st.com/content/ccc/resource/technical/document/application_note/7c/aa/38/48/55/61/43/f1/CD00004181.pdf/files/CD00004181.pdf/jcr:content/translations/en.CD00004181.pdf

App notes can be located under resources/technical documentation

https://www.st.com/en/microcontrollers-microprocessors/st9-8-bit-mcus.html#resource

[Bolan69]

Thank you!