USB 1.1 says:
11.5.1.10 SendEOP
This state is entered from the Resuming state if the 20ms timer expires.
It is also entered from the Enabled state when an SOF (or other FS token)
is received and a low-speed devices is attached to this port. In this
state, the hub will send a low-speed EOP (two low-speed bits times
of SE0 followed by one low-speed bit times of J). At the end
of the EOP, the state ends. ..................................
Our understanding:
When HC terminates the resume signal, it is done by sending low-speed
EOP (two low-speed bits times of SE0 followed by one low-speed bit times
of J). We infer that,
1. the period of J of this EOP is = 1 low speed bit time (= 8 bit
times of full speed) irrespective of the speed of the device and
2. the signal strength is DIFFERENTIAL 0 for a low speed device
and DIFFERENTIAL 1 for a full speed device.
Please give your feedback. Thanks in advance.
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Srikanth Kashyap S.
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But I don't have to know an answer.I don't feel frightened by
not knowing things, by being lost in the mysterious universe
without having any purpose, which is the way it really is, as
far as I can tell, possibly. It doesn't frighten me.
-- Richard P. Feynman
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