host controller (HC)
Wrong SOF waveform
After tx_ready pullup(T), PHY would send tx_ready(M1), then HC should keep the currently data for one more clock for phy to sample the data. But in following diagram, HC change data right after tx_ready pullup, the result is only the last byte is sent to USB bus.
2009年5月21日 星期四
USB UTMI
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