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[FAQ] TDA4VM: SDL LBIST POST Timeout

Guru* 93351 points
Part Number: TDA4VM

When testing SDL (Software Diagnostics Library) package on the TDA4VM, seeing LBIST HW POST Timeout logs as below.

BIST Example Application

Starting LBIST test on HWPOST - DMSC, index 0...
HW POST MCU Status : SDL_LBIST_POST_TIMEOUT
HW POST DMSC Status : SDL_LBIST_POST_TIMEOUT

Starting LBIST test on HWPOST - MCU, index 1...
HW POST MCU Status : SDL_LBIST_POST_TIMEOUT
HW POST DMSC Status : SDL_LBIST_POST_TIMEOUT

  • Not all TI TDA4VM device versions support LBIST POST, and for devices that do not, an LBIST POST timeout log is expected behavior.

    To determine if device under test supports LBIST POST, Register CTRLMMR_WKUP_POST_CFG0 (0x4300_C2C4); bit 31, which defines whether the PLL for FAST POST is enabled, can be read:

    • [31] = 0, LBIST POST Timeout is expected on the device under test
    • [31] = 1, LBIST POST will run as expected.

    Please also be aware of errata i2217 in the J721E Errata document, and its effects POST as well, which is also dependent on the device under test.