Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Atmel/AT91SAM9M11/TDES/MR#0x0
Mode Register
Processing Mode
ALGORITHM mode
Key Mode
Start Mode
Operation Mode
Last Output Data Mode
Cipher Feedback Data Size
Countermeasure Key
Countermeasure Type
https://github.com/cmsis-svd/cmsis-svd-data