In the spna126.pdf file, I see the mention of DIAG_EN_KEY
Diagnostic Control Register - DIAG_EN_KEY [3:0]
• DIAG_EN_KEY [3:0] = 0x5 - Enables diagnostic mode.
• DIAG_EN_KEY [3:0] = 0xA, or others - Disables diagnostic mode.
Can you please tell me where do I find the description of those fields within spnu489b.pdf file [TRM]?
The Diagnostic mode is supported in later versions of TMS570 , if the register description is not available in the respective TRM it is not supported for that device. For devices that does not support diagnostic mode there are reserved location within OTP which are delirabetely programmed to have single-bit and double bit errors , which could be used for failure checks.
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