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TUSB8041-Q1: idProduct=80ff

Raymond Zhang
Prodigy 40 points
Part Number: TUSB8041-Q1
Other Parts Discussed in Thread: TUSB8041

Tool/software:

Hi team,

As shown in the system diagram, all USB devices (including HUB) have been successfully enumerated. As shown in log1, only the enumeration logs of three hubs are listed. The logs of the other six devices are not posted. After about 4 seconds, all USB devices are disconnected. And after about another 4 seconds, TUSB8041 is enumerated again, but the PID enumerated at this time is 80ff. The correct enumeration should be 8142.

So under what circumstances will the PID become 80ff?

Thanks!

Attached log

Correctly enumerated log: (Omitted the enumeration log of six USB devices):

01-01 08:00:05.419   185   185 I usb 1-1 : New USB device found, idVendor=0451, idProduct=8142, bcdDevice= 1.00

01-01 08:00:05.419   185   185 I usb 1-1 : New USB device strings: Mfr=0, Product=0, SerialNumber=1

01-01 08:00:05.419   185   185 I usb 1-1 : SerialNumber: 9F010869C01A

01-01 08:00:05.420   185   185 I hub 1-1 : 1.0: USB hub found

01-01 08:00:05.420   185   185 I hub 1-1 : 1.0: 4 ports detected

01-01 08:00:08.326    15    15 I usb 1-1.1: new high-speed USB device number 3 using ehci-platform

01-01 08:00:08.427    15    15 I usb 1-1.1: New USB device found, idVendor=0451, idProduct=8242, bcdDevice= 1.00

01-01 08:00:08.427    15    15 I usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=1

01-01 08:00:08.427    15    15 I usb 1-1.1: SerialNumber: 920300599358

01-01 08:00:08.428    15    15 I hub 1-1.1: 1.0: USB hub found

01-01 08:00:08.428    15    15 I hub 1-1.1: 1.0: 4 ports detected

01-01 08:00:08.500    15    15 I usb 1-1.2: new high-speed USB device number 4 using ehci-platform

01-01 08:00:08.597    15    15 I usb 1-1.2: New USB device found, idVendor=0451, idProduct=8242, bcdDevice= 1.00

01-01 08:00:08.597    15    15 I usb 1-1.2: New USB device strings: Mfr=0, Product=0, SerialNumber=1

01-01 08:00:08.597    15    15 I usb 1-1.2: SerialNumber: 460308699358

01-01 08:00:08.598    15    15 I hub 1-1.2: 1.0: USB hub found

01-01 08:00:08.598    15    15 I hub 1-1.2: 1.0: 4 ports detected

The log of all USB devices disconnected:

01-01 08:00:12.686     5     5 I usb 1-1 : USB disconnect, device number 2

01-01 08:00:12.686     5     5 I usb 1-1.1: USB disconnect, device number 3

01-01 08:00:12.686     5     5 I usb 1-1.1.1: USB disconnect, device number 7

01-01 08:00:12.741     5     5 I usb 1-1.1.2: USB disconnect, device number 9

01-01 08:00:12.790     5     5 I usb 1-1.1.3: USB disconnect, device number 5

03-31 09:15:24.788     5     5 I usb 1-1.2: USB disconnect, device number 4

03-31 09:15:24.788     5     5 I usb 1-1.2.1: USB disconnect, device number 6

03-31 09:15:24.841     5     5 I usb 1-1.2.2: USB disconnect, device number 8

03-31 09:15:24.881     5     5 I usb 1-1.2.3: USB disconnect, device number 10

TUSB8041 re-enumeration log: (PID becomes 80ff at this time):

03-31 09:15:28.083   942   942 I usb 1-1 : new high-speed USB device number 11 using ehci-platform

03-31 09:15:28.237   942   942 I usb 1-1 : New USB device found, idVendor=0451, idProduct=80ff, bcdDevice= 1.01

03-31 09:15:28.237   942   942 I usb 1-1 : New USB device strings: Mfr=0, Product=0, SerialNumber=0