problem with U8A-64-FB96
Posted: Wed Apr 29, 2015 2:54 pm
Hi
I have a bit of a problem with U8A-64-FB96 chip that I have recently installed on the custom designed board
The problem is that the device appears to be completely invisible for the time composer (windows does not see any device getting connected at all, hence target hardware list is empty) and XTAG-2 (when XTAG is connected, in target hardware it says : XTAG-2 connected to none)
Although it receives power properly, buck converters are working well as well as reset pins
USB PHY receives 24Mhz clock (tested), DP and DN pins are routed correctly, 5v is provided to VSUP directly from USB, 3.3v is provided for VDDIO through a step-down converter, USB VBUS (5v) is connected through a 1k resistor.
AVDD pin is not connected as ADC is not being used.
Please help
Regards,
I have a bit of a problem with U8A-64-FB96 chip that I have recently installed on the custom designed board
The problem is that the device appears to be completely invisible for the time composer (windows does not see any device getting connected at all, hence target hardware list is empty) and XTAG-2 (when XTAG is connected, in target hardware it says : XTAG-2 connected to none)
Although it receives power properly, buck converters are working well as well as reset pins
USB PHY receives 24Mhz clock (tested), DP and DN pins are routed correctly, 5v is provided to VSUP directly from USB, 3.3v is provided for VDDIO through a step-down converter, USB VBUS (5v) is connected through a 1k resistor.
AVDD pin is not connected as ADC is not being used.
Please help
Regards,