FTDI FT4232HL Issues With Overo Gumstix

[craigopie]

Aloha,

I have a custom project board that is using an Overo Gumstix as the processing unit.  My issue is that the Gumstix is not identifying the FT4232HL during startup and operation.  I am trying to use the FT4232HL as a separate USB Host Bus for a single external device that is providing a TTL input with baud rate of 921600. 

I am using the USBH_DM and USBH_DP for data and GPIO168_USBH_CPEN to drive a 5V source to my USBH_VBUS.  I do not have the EEPROM for my FT4232HL as the manual says it is optional.  I have the following pins connected to the following sources:

GND:
pin 13
pin 10
pin 51
pin 47
pin 35
pin 25
pin 15
pin 11
pin 5
pin1

Vcc 3.3V (200mA) Source:
pin 50
pin 14
pin 4
pin 9
pin 20
pin 31
pin 42
pin 56

Vcore 1.8V Source:
pin 12
pin 37
pin 64
pin 49

12 MHz Oscillator:
pin 2 -> 3

12KOhm Resistor:
pin 6

USBH_DM:
pin 7

USBH_DP:
pin 8

Serial Device (TTL):
pin 16
pin 17

Checking Pin 60 (PWREN) I get a Logic 1 (expected Logic 0)
Checking Pin 36 (Suspend) I get a Logic 0

The device indicates that it is suspended.  All continuity checks were completed SAT.  I tried loading a custom driver for the chip but that didn't work either so I went back to the FTDI supplied drivers.  I am testing for the chip not getting enough power since it is rated for 150mA and I have a 200mA power supply for it, and have already removed the indicating LED to limit the current draw.  But I don't think that is going to be the issue since I am trying to get it to startup without having a load on it. 

Has anyone had issues with this in the past and if so how did you fix it?  I know there are a lot of smarter people on this site than I am alone so maybe we can figure this out together.  Thanks in advance for your help.

Mahalo,
Craig

[Wiljan]

Did you ever find the problem?

I have a FPGA board with a onboard FT4232TL and when connecting the USB cable I get 4 Com port's up in the device manager windows 7 64bit so far so fine.

They stay there until I start using 1 of the ports

When open 1 of the comports the data flows well in / out but after 0-5 min all 4 com ports goes away from the device manger  pin 60 PWREN are Low and pin 36 SUSPEND are 3.3V

If I reset the FDTI they comes back again

I have disconnected the EEPROM to eliminate any crazy settings

Using FTDI driver  2.12.28.0

I also have a separate FT4232H mini modules using that I never see the problem on the same PC