TPS65983A with TPS65982, HARD RESET occur when TPS65982 sends DR swap

Sam Pan

Expert 3860 points

Other Parts Discussed in Thread: TPS65982, TPS6598X-CONFIG

Hi Team,

One issue with TPS65983 and TPS65982

The TPS65982 is with 1.7.6 FW and TPS65983 with 3.3 FW

TPS65982 FW as DRP and enable initial swap to DFP

TPS65983 use Apex Creek FW

Follow below sequence, then we see HARD RESET

1. TPS65982 power up with VIN_3V3 = 3.3V and PP_5V0/PP_CABLE = 5V

2. Plug in TPS65983 board(apex creek), then TPS65982 is DFP and sink

3. Turn off TPS65982 VIN_3V3 and PP_5V0/PP_CABLE power

4. see the connection loss and re-establish, TPS65982 will then send data role swap to be DFP

5. HARD RESET occur after the DR SWAP command

Below is the trace record after turn off TPS65982 VIN_3V3 and PP_5V0/PP_CABLE, then see HARD RESET after DR SWAP

If we change TPS65983 board to TPS65982 with Apex creek FW, then no see HARD RESET

Could you help check? Thanks!

T303_S3_pluged in to Apex creek_983A.usb

Sam

over 9 years ago

0 Brian Berner over 9 years ago

TI__Mastermind 30310 points

Sam,

What version of the TPS6598X-CONFIG Tool and TPS65983-CONFIG Tools did you use to generate this FW?

If you haven't upgraded to the latest versions of the Tools, I would suggest doing this first to upgrade your FW to re-test and correlate results.

For the TPS65982, this Training might help you get started: training.ti.com/tps65982-config-tool-upgrade-sw-fw-training

The TPS65983 has always been using the Beta GUI Tool, but there is a new version of FW available (>v3.3)

0 Sam Pan over 9 years ago in reply to Brian Berner

TI__Expert 3860 points

HI Brian,
Previously with TPS6598X-CONFIG Tool 1.15 and TPS65983-CONFIG Tools 2.7
Today I tried TPS6598X-CONFIG Tool 2.8 and TPS65983-CONFIG Tools 2.9(all latest one), the result is still the same

Regards,
Sam

0 KUNVICHET LEE75 over 8 years ago in reply to Sam Pan

Prodigy 240 points

Hi Brian,

Has this issue been resolved? I am running into a similar error using all the latest tools (TPS6598X Application Customization Tool V2.15, TPS6598X Host Interface Tools v2.3).

I am using TPS65986A as power brick/charger and a TPS65982 BoosterPack as sink. With the Aardvark connected to the BoosterPack, I can request an output from the TPS65896A; However, I'm getting a hard reset every so often. I am not sure what is causing that. Below is the setup:

1. TPS65986 power up with VIN_3V3 = 3.3V, PP_5V = 0, PP_CABLE = 5V, PP_HV = 5-20V (as output)
2. Attach TPS65982 BoosterPack
3. Aardvark attached to BoosterPack and in Tx Sink Cap (0x33) there are 2 PDOs with PDO1 = 5000mV, PDO2 = 2000mV.
4. Change PDO2 to 9000mV
5. A Neg, Execute Function
6. Hard reset occurs

Attached is the Data Center capture.Data Center.xlsx

thanks,

Vichet

0 Eric Beljaars over 8 years ago in reply to KUNVICHET LEE75

TI__Mastermind 36756 points

Hi Vichet,

The TPS65986 EVM does not have the ability to source 9V as there is no 9V DC-DC on that board. This will cause a hard reset event to occur as the device is unable to source the specific PDO.

Thank you,
Eric

0 KUNVICHET LEE75 over 8 years ago in reply to Eric Beljaars

Prodigy 240 points

Eric,
Thanks for your reply. I am not using TPS65986 EVM. The TPS65986 is on my custom design board with 4 PDOs (5V, 9V, 15V and 20V @ 3A). I am using the TPS65982 EVM as the sink to test. The 5V and 20V seem to work pretty well, but whenever a request for 9 or 15V, the hard reset occur.

thanks,
Vichet

0 Eric Beljaars over 8 years ago in reply to KUNVICHET LEE75

TI__Mastermind 36756 points

Hi Vichet,

There are many reasons why a Hard Reset event may occur. Can you check register 0x40 PD Status and look at HardResetType?
This will help determine why the message is being sent.

Thank you,
Eric

0 KUNVICHET LEE75 over 8 years ago in reply to Eric Beljaars

Prodigy 240 points

I'm getting "HardReset_RequiredByPolicyEngine_DischargeFailed". Where can I find out more about this failure.

thank you,
Vichet

0 Eric Beljaars over 8 years ago in reply to KUNVICHET LEE75

TI__Mastermind 36756 points

Hi Vichet,

This is set when the PD Controller fails to discharge VBUS. Could you potentially go from a 5V to a 9V PDO?
For more info you can look at the Host Interface Technical Reference Manual: www.ti.com/.../slvuan1a.pdf

Thank you,
Eric

0 KUNVICHET LEE75 over 8 years ago in reply to Eric Beljaars

Prodigy 240 points

Eric,
Sometimes I can go from 5V to 9V to 15V to 20V without any errors. Once in awhile I'll get a hard reset error when going from low to high voltage, for example 5V up to 15V, then I would get "HardReset_RequiredByPolicyEngine_UnableToSource". When going down from high to low, i.e., 20V down to 9V, then I would get "HardReset_RequiredByPolicyEngine_DischargeFailed"; even with a small load.

Any idea?

thanks,
Vichet

0 Eric Beljaars over 8 years ago in reply to KUNVICHET LEE75

TI__Mastermind 36756 points

Hi Vichet,

This indicates that the Hard Reset messages are being sent due to your source not being able to switch voltages fast enough. Are you using a variable DC-DC to change the Source voltages when different PDOs are being negotiated? If so, do you have a lot of capacitance on the output?
My advice would be to make your on board power source be able to switch between the voltages faster.

Thank you,
Eric

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TPS65983A with TPS65982, HARD RESET occur when TPS65982 sends DR swap