SPRZ487F May   2022  – December 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
      3.      i2424
    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
      43.      i2431
  4.   Trademarks
  5.   Revision History

i2431

BCDMA: RX Channel can lockup in certain scenarios

Details:

BCDMA RX chan Teardown can lockup channel and cannot be used for subsequent transfers if none of the TRs have EOP flag set in configuration specific flags field. Subsequently when channel is re-enabled, transfer would not complete and will terminate with various errors in TR response.

Workaround(s):

a) When receiving data from a PSIL/PDMA peripheral, EOP flag needs to be set in the each TR's configuration specific flag field and PDMA's 1 X-Y FIFO Mode Static TR "Z" paramater should be set to non zero value in order for channel teardown to function properly and cleanup the internal state memory. Otherwise it leads to channel lockups on subsequent runs. The PDMA Z count should also match the TR size, so that PDMA delineates each transfer as an individual packet. This is especially problematic in cases like where TRPD has infinite reload count set to perform cyclic transfer using a single set of TRs in streaming mode, in which case each TR could potentially be the last one.

b) If the usecase doesn't allow for PDMA Z count to be set in advance or packet EOP cannot be set then alternate is to use PKTDMA in single buffer mode instead of BCDMA.