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Can AM3715 run under 19.2MHz input clock?

Colman Lai
Intellectual 830 points
Other Parts Discussed in Thread: AM3715

When I study the x-loader code for AM3715, I found a comment in function prcm_init() in omap3evm.c, it state that:

/* If the input clock is greater than 19.2M always divide/2 */
 /*
  * On OMAP3630, DDR data corruption has been observed on OFF mode
  * exit if the sys clock was lower than 26M. As a work around,
  * OMAP3630 is operated at 26M sys clock and this internal division
  * is not performed.
  */

Is it true that it can only work at 26MHz input clock? And cannot work at 19.2MHz input clock?

Regards,

Colman

  • 0
    TI__Guru* 85960 points

    This comment refers to advisory 1.90 (Self-Refresh Exit Issue after OFF mode) in the errata.  There are workarounds described in the errata, but note that it only applies to ES 1.0 and 1.1.  This has been fixed in the latest release of silicon ES 1.2.

    Regards,

    james