Revision(s) Affected:

AWR2243 ES1.0, ES1.1

Description:

During the first powerup, there could be occasional failures in the EDMA self-test. It is reported as part of the "AWR_AE_MSS_BOOTERRORSTATUS_SB" flag during bootup. This is due to the undefined states of certain flops during first powerup. This blocks the EDMA channel and eventually fails any subsequent EDMA transfers as well.

EDMA is also used to transfer out ADC/CP/CQ data on the CSI or LVDS interface as well, so this data transfer would also fail in that case.

Workaround(s):

The host application needs to monitor the BOOTERRORSTATUS flag. If the EDMA_Self Test flag is set to ‘1’, indicating failure, it should issue an nReset to the mmWave device. This should be done without power cycling the device, i.e. disabling the power supplies to the mmWave device.