CRITICALITY

Medium

DESCRIPTION

Read accesses to registers listed below can be corrupted due to incorrect resynchronization between clock domains.

Read access to registers below can be corrupted:

• CTRL_CORE_DTEMP_MPU/GPU/CORE/DSPEVE/IVA_n (n = 0 to 4)
• CTRL_CORE_TEMP_SENSOR_MPU/GPU/CORE/DSPEVE/IVA

WORKAROUND

Multiple reads to CTRL_CORE_TEMP_SENSOR_MPU/GPU/CORE/DSPEVE/IVA[9:0]:

BGAP_DTEMPMPU/GPU/CORE/DSPEVE/IVA is needed to discard false value and read right value:

1. Perform two successive reads to BGAP_DTEMP bit field.
   1. If read1 returns Val1 and read2 returns Val1, then right value is Val1.
   2. If read1 returns Val1, read 2 returns Val2, a third read is needed.
2. Perform third read
   1. If read3 returns Val2 then right value is Val2.
   2. If read3 returns Val3, then right value is Val3.

Note: A maximum of three reads is required. Those three reads must be performed within the delay between two consecutive measurements, otherwise methodology is not conclusive. This delay is configured in the COUNTER_DELAY field of CTRL_CORE_BANDGAP_MASK_1.

REVISIONS IMPACTED

AM571x SR 2.1, 2.0, 1.0
AM570x SR 2.1, 2.0

DRA79x: 2.1, 2.0

TDA2Ex (23mm): 2.0, 1.0

TDA2Ex (17mm): 2.1, 2.0

AM571x: 2.1, 2.0, 1.0

AM570x: 2.1, 2.0

DRA72x: 2.0, 1.0

DRA71x: 2.1, 2.0