ASIC/FPGA Design and Verification Out Source Services

The USB RX FSM

1. The RX FSM gets a serial stream of data from RX DA. It outputs parallel data. It does the bit un-stuff and NRZI.
2. The input SIE is synchronized to the USB data valid-usb_dv- signal. The FF input equation is : sie sync FF input equation..
3. The input data, usb_do, is sampled, with regard to the USB data valid, usb_dv. The FF input equation is at: usb rx fsm data valid register..
4. The NRZI detection is done next, as can be seen at: NRZI equation..
5. The output of the de-NRZI, namely rx_di, is fed to three targets as explained in the diagram: rx_di block diagram..
6. The waves,describing the interface are at: sb rx fsm wave..

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