Hello there,
I got the following problems:
1) The IC does not recognise any externally connected USB-Hubs. Mouse, keyboard etc. is still functional on that port (Port 2). The HUB is connected to a computer via port 0. Data transfer speeds seem to be fine.
2) Sometimes, not really reproducible, the hub suddenly stops working and the only way to get the HUB back to work normally is to cut the power for a second.
I would really appreciate any hint. Thank you!
Kind regards
Andre
Hello Joel,
we changed the RC part to 15kOhm, 0.1uF -> No changes, the device still stops working sometimes. As said before, we haven't had a problem with not initialising correctly. It always happens while it is working just fine for a while.
I monitored Vcc and RESET terminals -> All signals very stable, no ripples or dips.
I disconnected the pins from Port 4 and attached an USB-cable but same phenomenon -> Mouse or Keyboard are no problems, they work just fine. USB-sticks or DVBT sticks or HUBs are not properly recognised and fail.
I added serial resistors just in case -> did not change anything! I also double-checked the trace length which difference is dl < 150 um.
The traces using USBTreeview.exe.
General trace without malfunctioning device:
5618.Generic USB Hub on MIOM2419.txt
Single trace of not recognised device:
=========================== USB Port2 ===========================
Connection Status : 0x02 (Device failed enumeration)
Port Chain : 1-1-4-3-2
Properties : 0x01
IsUserConnectable : yes
PortIsDebugCapable : no
PortHasMultiCompanions : no
PortConnectorIsTypeC : no
======================== USB Device ========================
+++++++++++++++++ Device Information ++++++++++++++++++
Device Description : Unbekanntes USB-Gerät (Fehler beim Anfordern einer Gerätebeschreibung.)
Device Path : \\.\usb#vid_0000&pid_0002#8&21d97485&0&2#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
Device ID : USB\VID_0000&PID_0002\8&21D97485&0&2
Hardware IDs : USB\DEVICE_DESCRIPTOR_FAILURE
Driver KeyName : {36fc9e60-c465-11cf-8056-444553540000}\0025 (GUID_DEVCLASS_USB)
Driver Inf : C:\WINDOWS\inf\usb.inf
Legacy BusType : PNPBus
Class : USB
Class GUID : {36fc9e60-c465-11cf-8056-444553540000} (GUID_DEVCLASS_USB)
Interface GUID : {a5dcbf10-6530-11d2-901f-00c04fb951ed} (GUID_DEVINTERFACE_USB_DEVICE)
Enumerator : USB
Location Info : Port_#0002.Hub_#0010
Manufacturer Info : (Standard-USB-Hostcontroller)
Capabilities : 0x44 (Removable, RawDeviceOK)
Status : 0x01806400 (DN_HAS_PROBLEM, DN_DISABLEABLE, DN_REMOVABLE, DN_NT_ENUMERATOR, DN_NT_DRIVER)
Problem Code : 43 (CM_PROB_FAILED_POST_START)
Address : 2
Power State : D3 (supported: D0, D2, D3, wake from D0, wake from D2)
---------------- Connection Information ---------------
Connection Index : 0x02 (2)
Connection Status : 0x02 (DeviceFailedEnumeration)
Current Config Value : 0x00
Device Address : 0x00 (0)
Is Hub : 0x00 (no)
Number Of Open Pipes : 0x00 (0)
Device Bus Speed : 0x00 (Low-Speed)
--------------- Connection Information V2 -------------
Connection Index : 0x02 (2)
Length : 0x10 (16 bytes)
SupportedUsbProtocols : 0x01
Usb110 : 1 (yes)
Usb200 : 0 (no)
Usb300 : 0 (no)
ReservedMBZ : 0x00
Flags : 0x00
DevIsOpAtSsOrHigher : 0 (Is not operating at SuperSpeed or higher)
DevIsSsCapOrHigher : 0 (Is not SuperSpeed capable or higher)
DevIsOpAtSsPlusOrHigher : 0 (Is not operating at SuperSpeedPlus or higher)
DevIsSsPlusCapOrHigher : 0 (Is not SuperSpeedPlus capable or higher)
ReservedMBZ : 0x00
---------------------- Device Descriptor ----------------------
bLength : 0x00 (0 bytes)
-------------------- String Descriptors -------------------
String descriptors are not available (because the device has problem code CM_PROB_FAILED_POST_START)
Hello Joel,
The 1k5 Ohm resistor is realised using the STF202-22T1G. Therefore, yes.
Yes the DP+- of each individual port are connected together and tied to ground. These are ports D1 and D3
Joel Jimenez0 said:Hello,
Could you please clarify the following points from your schematics?
1.- 1.5kOhm pull-up resistor in DP0.
2.- 10kOhm pull-down resistor in used downstream ports (D+/-).
Regards
Kind regards,
Andre
