EZ-USB® HX2VL™ Crystal Stopping after the Hub Out from Reset – KBA87757 | Cypress Semiconductor
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EZ-USB® HX2VL™ Crystal Stopping after the Hub Out from Reset – KBA87757
Why does the USB® HX2VL™ crystal stop after the hub out from reset?
The crystal stops operation in Suspend mode. When there is no activity on the upstream USB bus for more than 3 ms, HX2VL enters suspend mode. Therefore, when you reset HX2VL with no devices connected to any of the downstream ports, HX2VL goes into Suspend mode and the crystal stops operation.