Is there a way for the software inside the PIC to detect when the USB cable has been detached from a PIC16C765?
We haven't been able to find a register bit that indicates when the cable is not attached.
Thanks, David
PIC16C765 detect USB cable detached
Jun 30, 2007
1 Replies
You could use the USB CONTROL REGISTER (UCTRL: 195h) bit 5: SE0: Live Single Ended Zero This status bit indicates that the D+ and D- lines are both pulled to low.
1 = Single ended zero being received 0 = Single ended zero not being receivedYou could also detect an idle state with USB INTERRUPT FLAGS REGISTER (UIR: 190h) bit 4: UIDLE: This bit is set if the USB has detected a constant idle on the USB bus signals for 3 ms. The idle timer is reset by activity on the USB bus. Once a IDLE condition has been detected, the user may wish to place the USB module in SUSPEND by setting the SUSPEND bit in the UCTRL register.
-- Joe
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required