3. TECHNICAL BRIEF
- 21 -
The security features use the following mechanism:
• Boot ROM flow:
- Controls the boot transition to external flash
- Controls the flash update
• Flash tied to the individual chip via an ID using e-fuses, that is, each E-GOLDvoice chip has its
own fused ID.
Further details on the E-GOLDvoice security concept are not publicly documented.
3.1.16 Asynchronous Operation Mode Concept
The E-GOLDvoice can operate in either:
• The traditional synchronous mode with the 26MHz system clock synchronized on the base station
• A special asynchronous mode (XO concept).
In the asynchronous mode the 26MHz clock input is not synchronized with the base station; the
residual frequency offset is compensated in the digital signal processing domain. This processing
includes frequency and timing compensation of the baseband and voiceband signals.
To Next Page
Loading...
