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TUSB320: Some model of iphone can not be identified

PYTsai
Genius 12310 points

Part Number: TUSB320

Hi 

My customer report an issue that some iphone model can not be identified. can you help review below log? any idea why this happen and how to fix it ? thanks!

 

before iphone plug in USB

VBUS:0

USB320 Register

0x08:0x00

0x09:0x20

0x0a:0x10

 

alfter iphone plug in USB (NG, No MTP)

VBUS : 1

USB320 Register

0x08: 0x00

0x09: 0x80

0x0a:0x10

 

after iphone plug in USB (OK)

VBUS : 1

USB320 Register

0x08: 0x00

0x09: 0x80

0x0a:0x10

 

Log of NG (fail to id the iphone)

----------------------------------------------------------

[DBG]:al_DoEventHandle_kevt[1529]: --KEYDEF_USB_PLUGIN  charging key event.value:1

[DBG]:SetCharger[2708]: [SetCharger] SetCharger. Val:0 logChargerLevel:0

[DBG]:SetChargingFunction[2802]: [SetChargingFunction] Request to ENABLE charging.

[DBG]:SetChargingFunction[2814]: [SetChargingFunction] Success.

[INFO]:FuncUpdateBattery[894]:

Batt level =1

[INFO]:operator()[363]:

[User]  (415.956, +13375)        go_show: show top panel capture_top_bar.c:457

 

<6>tusb320 0-0061: attached state: upstream facing port, cable direction: CC1, accessory: none

[DBG]:OnUsbPluginTimerExpired[2041]: [Capture]--- OnUsbPluginTimerExpired: USB plugin 2sec timer expired. ---

[OnUsbPluginTimerExpired][2042] SetCharger 1.

[DBG]:SetCharger[2708]: [SetCharger] SetCharger. Val:1 logChargerLevel:0

[DBG]:SetChargingFunction[2802]: [SetChargingFunction] Request to ENABLE charging.

[DBG]:SetChargingFunction[2814]: [SetChargingFunction] Success.

---------------------------------------------------------

  • 0
    TI__Guru 55845 points

    Hello,

    Can you help to provide the customers schematic for the TUSB320? What is their intended application, DFP or UFP?

    Can the customer capture any waveforms for CC1 and CC2 before after and a connection is made?

    Can the customer try different USB-C cables and see if the issue is still there?

    If they have any components on the CC lines, I.E ESD or resistors, I would recommend removing these.

    Thanks,

    Ryan

  • 0 in reply to Ryan Kitto
    TI__Guru 55845 points

    Hello,

    Closing thread due to inactivity. If you have any follow-up questions or concerns, feel free to reply.

    Thanks,

    Ryan