7-9 USB2.0 Communication Problem
USB
Problem
Main PBA I/F | Y |
Failure? |
|
| |
N |
|
1.Check the Control Line & Signal (/CS_U,/RD,/LWR,USB_/IRQ)
2.Check the Data Line and Signal
3.Check the Connector (34P)
4.Check the Clock (30MHz)
5.Check the related Circuit & Pattern on Main PBA
Reverse Mode | Y |
Failure? |
|
| |
N |
|
1.Check the Clock (30MHz)
2.Check the Host whether it works correctly
3.Check the USB Cable whether it is open or shot
4.Check the related Circuit & Pattern on Main PBA
End
Rev. 2.01 | - 59 - |
