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TPS65982: After register 0x28 contents are changed affect sending AMEx command

Steve Hung
Intellectual 310 points
Part Number: TPS65982


Hi,

GPIO_4 of TPS65982 as DP_HPD had leakage during sleep mode , TI provide beow workaround before.

Now, the USB_RP and USB_EP also had leakage during sleep mode, TI provide the workaround that change register 0x28 contents to disable the USB_RP and USB_EP fields. type-c port will be a disconnect is forced that also let beow workaround does not work.

How we can make this 2 workarounds work at the same time ? Thanks!

TI proposal is to exit DP mode (by sending AMEx command as below) at the moment when you enter sleep mode, and enter DP mode (by sending AMEn command as below)  at the moment when your system wake up.

  • ·       AMEx:

1.     Write 0xff0101 to 0x09 (for DP mode case)

2.     Write 0x78454D41 to 0x08 register

  • ·       AMEn:

1.     Write 0xff0101 to 0x09 (for DP mode case)

2.     Write 0x6E454D41 to 0x08 register