TPS25751: Debug accessory mode entry

zong xu

Part Number: TPS25751

Tool/software:

Hi TI expert,

Currently i'm working on the TPS25751's debug accessory mode entry, i tried to place 2x Rd(5.1K) separately on CC1 & CC2 line, both CC1 & CC2 voltage become 0.4V, i assume TPS25751 already observe the 2x Rd presence, but it failed to response since GPIO11 kept staying low(GPIO11 already configured as GPIO event #50: Debug_Accessory_Mode_Event). Could you kindly give some guidance on the Debug accessory mode entry, many thanks!

Attach the TPS25751 configuration setting as below:

0323-json.zip

Attach the waveform captured as below:

2 months ago

0 Raymond Lin 2 months ago

TI__Mastermind 34826 points

Hi Zong,

Apologies for the delayed response, please see my feedback below.

If you use the latest GUI (v1.1.0 for PD3.2 or v1.0.3 for PD3.1) there is a bitfield in register Port Configuration (0x28) to enable or disable Debug Accessory Support [12]. This bit needs to be enabled in order for TPS25751 to detect debug accessory mode:

Here are the relevant GUI links, you can import your current JSONs into either GUI versions:

PD3.2 GUI: https://dev.ti.com/gallery/view/USBPD/USBCPD_Application_Customization_Tool/ver/1.1.0/

PD3.1 GUI: https://dev.ti.com/gallery/view/USBPD/USBCPD_Application_Customization_Tool/ver/1.0.3/

Let us know if you have any further questions or concerns!

Thanks and Regards,

Raymond Lin

Power management

Power management forum

TPS25751: Debug accessory mode entry