TUSB4020BI: Unable to go back to default driver

Hi,

Are you programming TUSB4020 with an external EEPROM? 

If you remove the EEPROM, are you able to get back to Window default Generic USB eHCI or xHCI Host Controller driver under the Win Device Manager?

Thanks

David

I am using an EEPROM; AT24C04D.  You mean unsolder the EEPROM to get the Generic USB Driver to reinstall?  This is a small production product (500 units a month), so that is not practical.

I can browse to the driver (if I knew what it was, and where it was) to install it.

Hi,

Did you program the EEPROM? If you did, can you please share your EEPROM programming file?

Thanks

David

I did program it; here is the file.

00	55	01010101	'ROM Signature - Do NOT modify!
01	51	01010001	'Vendor ID LSB - Can be modified
02	04	00000100	'Vendor ID MSB - Can be modified
03	25	00100101	'Product ID LSB - Can be modified 
04	80	10000000	'Product ID MSB - Can be modified
05	10	00010000	'Device Configuration - Can be modified -  ports are not ganged, OC status enabled
06	00	00000000	'Battery Charging (1 = enabled) 0
07	80	10000000	'Device Removable- Can be modified - Devices on both ports 1 and 2 not are removable
08	03	00000011	'Port Used- Can be modified - Both ports 1 and 2 are enabled
09	00	00000000	'RSVD
0A	20	00100000	'Device Configuration Register 2 - Can be modified - PWRCTL active high mode
0B	00	00000000	'RSVD
0C	00	00000000	'RSVD
0D	00	00000000	'RSVD
0E	00	00000000	'RSVD
0F	00	00000000	'RSVD
20	09	00001001	'Language ID - Can be modified
21	04	00000100	'Language ID -  Can be modified - 0x0409 = English UNited States
22	18	00011000	'Serial Number String Length -  Can be modified 
23	00	00000000	'Manufacturer String Length - Can be modified 
24	00	00000000	'Product String Length - Can be modified
25	00	00000000	'RSVD
2F	00	00000000	'RSVD - NEW
F0	00	00000000	'Additional Feature Configuration Register - Enable spread spectrum
F1	00	00000000	'Added to disable a test function
F2	00	00000000	'Charging Port Control Register - Power on delay = 200ms

Hi,

If you go to the Win Device Manager, right click on TI TUSB8040 EEPROM Programming Endpoint and select “Update Driver Software”, then “Browse my computer for driver software”, then “Let me pick from a list of device drivers on my computer”, and then “Have disk”, are you able to select Generic Hub as the driver?

Thanks

David

No, it does not show up.

If I select “Update Driver Software”, then “Browse my computer for driver software”, then “Let me pick from a list of device drivers on my computer”,  Then uncheck "show compatible hardware" then I can pick "Generic USB Hub".  But it will show up in the listing with a yellow "warning" that it will not work because it is incompatible.  But I an unplug the USB device and plug it in again and then it works.

Hi,

Are you saying that the Win does not recognize the hub after you programming the EEPROM, but will recognize it after your power cycle the hub? If this is the case, then this is an expected behavior since Win will only read the EEPROM after your power cycle the hub. Power cycling the hub is the same as disconnect/connect the hub.

Thanks

David

Nope, not what I am saying.  If you just power cycle the hub, it would still NOT show up as "Generic USB Hub"  stayed at "Programming Endpoint".  After I forced it to load the "Generic USB Hub" by unchecking "show compatible hardware" and then power cycling the HUB it would show in the device manager as "Generic USB Hub",