Hi,
It use i.MX6D USB Host1 and use SABRE AI board with Baseboard.
I'd like to know if it is possible to detect disconnection of USB device by monitor SE0 state of PORTSC1 LS bits?
Best Regards,
Sugiyama
Hi Sugiyama
yes this can be used in LS/FS modes, HS mode use other high-speed signaling
and seems this is not possible, as "Disconnection Envelope Detector" used in that case.
Please check sect.7.1.7.3 Connect and Disconnect Signaling USB 2.0 specification
found on usb.org.
Best regards
igor
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Hi, Igor,
I checked LS bits in PORTSC1 when connect device by using memtool, it is still SE0 even though D+ is high at I/O port.
I enabled USB clock gate at that time.
Does it require any setting to read port status by LS bits?
Best Regards,
Sugiyama