SPRZ580 December   2024 AM62D-Q1

 

  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.      i2134
      4.      i2189
      5.      i2196
      6.      i2199
      7.      i2208
      8.      i2249
      9.      i2278
      10.      i2279
      11.      i2310
      12.      i2311
      13.      i2312
      14.      i2366
      15.      i2371
      16.      i2120
      17.      i2137
      18.      i2253
      19.      i2383
      20.      i2401
      21.      i2407
      22.      i2409
      23.      i2410
      24.      i2376
      25.      i2399
      26.      i2413
      27.      i2414
      28.      i2417
      29.      i2419
      30.      i2420
      31.      i2421
      32.      i2422
      33.      i2423
      34.      i2431
      35.      i2435
  4.   Trademarks
  5.   Revision History

i2383

OSPI: 2-byte address is not supported in PHY DDR mode

Details:

When the OSPI controller is configured for 2-byte addressing in PHY DDR Mode, an internal state machine mis-compares the number of address bytes transmitted to a value of 1 (instead of 2). This results in a state machine lockup in the address phase, rendering PHY DDR mode non-operable.

This issue does not occur when using any Tap mode or PHY SDR mode. This issue also doesn't occur when using 4 byte addressing in PHY DDR mode.

Workaround(s):

For compatible OSPI memories that have programmable address byte settings, set the amount of address bytes required from 2 to 4 on the flash. This may involve sending a specific command to change address bytes and/or writing a configuration register on the flash. Once done, update the amount of address bytes sent in the controller settings from 2 to 4.

For compatible OSPI memories that only support 2-byte addressing and cannot be re-programmed, PHY DDR mode will not be compatible with that memory. Alternative modes include:

  • PHY SDR mode
  • TAP (no-PHY) DDR mode
  • TAP (no-PHY) SDR mode