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Original question:

BOOSTXL-TUSS4440: DRV Rdy flag in GUI is always 0, with USB or Ext power does not matter. No echo.

BOOSTXL-TUSS4440: VDRV Rdy bit always zero. No echo.

inya_lake1
Prodigy 145 points
Part Number: BOOSTXL-TUSS4440

Hi,

 I'm having same issue where VDRV Rdy bit is always zero. No echo as well. Attached is registers that I have read. Please help.

  • +1
    Prodigy 145 points

    INDUS_REG_USER_MEMSPACE.txt 
    ;INDUS_REG_USER_MEMSPACE
10 (BPF_CONFIG_1),00
11 (BPF_CONFIG_2),00
12 (DEV_CTRL_1),0E
13 (DEV_CTRL_2),00
14 (DEV_CTRL_3),00
15 (DEV_CTRL_4),00
16 (VDRV_CTRL),20
17 (ECHO_INT_CONFIG),07
18 (ZC_CONFIG),14
19 (XFMR_DRV_LIM),00
1A (BURST_PULSE),10
1B (TOF_CONFIG),00
1C (DEV_STAT),00
1D (DEVICE_ID),99
1E (REV_ID),02
1F (DEV_TI_UNLOCK),00
EOF

  • 0 in reply to inya_lake1
    TI__Genius 15780 points

    Inya,

    Thank you for reaching out with your question.  Based on your register settings it looks like you are using the following registers:

    • VDRV_HI_Z = 1 - This disables VDRV regulation and is set by default at power up.  To enable VDRV this bit must be cleared.
    • VDRV_TRIGGER = 0 - Disables charging of VDRV pin when DIS_VDRV_REG_LSTN=1.  This has no effect when VDRV_HI_Z = 1
    • DIS_VDRV_REG_LSTN = 0 - Automatically disables VDRV charging in listen mode after burst mode is exited

    Based on the DEV_State pin, it looks like your device is currently in listen mode for your screen capture.  To enable VDRV you will need to clear VDRV_HI_Z and then initiate a burst trigger event.  More information on these register settings is here:

    Thanks,

    Scott