SPRZ487E May   2022  – June 2024 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP

 

  1.   1
  2. 1Usage Notes and Advisories Matrices
    1. 1.1 Devices Supported
  3. 2Silicon Usage Notes and Advisories
    1. 2.1 Silicon Usage Notes
      1.      i2351
      2.      i2372
    2. 2.2 Silicon Advisories
      1.      i2049
      2.      i2062
      3.      i2097
      4.      i2103
      5.      i2134
      6.      i2189
      7.      i2196
      8.      i2232
      9.      i2244
      10.      i2310
      11.      i2311
      12.      i2327
      13.      i2328
      14.      i2279
      15.      i2307
      16.      i2320
      17.      i2329
      18.      i2208
      19.      i2249
      20.      i2278
      21.      i2312
      22.      i2366
      23.      i2371
      24.      i2253
      25.      i2283
      26.      i2383
      27.      i2401
      28.      i2407
      29.      i2409
      30.      i2410
      31.      i2413
      32.      i2414
      33.      i2415
      34.      i2416
      35.      i2417
      36.      i2418
      37.      i2419
      38.      i2420
      39.      i2421
      40.      i2422
      41.      i2423
      42.      i2435
  4.   Trademarks
  5.   Revision History

i2307

Boot: ROM does not properly select OSPI clocking modes based on BOOTMODE

Details

The ROM bootloader only selects an internal loopback mode for SPI/QSPI/OSPI/xSPI boot, regardless of the Iclk field value selected by the BOOTMODE pins (see the device specific TRM for BOOTMODE pin mappings), which is intended to allow the user to choose an internal or external clocking method. This results in less flexibility in board topology in customers designs. Customers intending to use the external board loopback mode could see timing issues in ROM boot because the external loopback clock is not being used.

Workaround

The topology of the OSPI design must not use "External Board Loopback" if planning to use OSPI as a boot source. All other clocking topologies (including internal loopback or DQS) can be used. Refer to the device specific datasheet, section "Applications, Implementation, and Layout" for supported clocking topologies using OSPI.