IP2022 User’s Manual—Peripherals www.ubicom.com 289 Figure 4-11  USB Interface Example The  SxMODE  register  must  be  programmed  with  values  for  a
recovered    clock,    and    the    PLL    clock    multiplier    must    be
programmed to generate the appropriate frequency. For example,
it can be programmed at 48 MHz for full speed with a divisor of
zero  (=1).  A  divisor  of  8  will  make  it  suitable  for  low-speed
operation. The synchronization pattern must be programmed into
the  SxRSYNC  register  to  trigger  an  interrupt  when  a  packet  is
received. PDIUSBP11A SxRXD IP2022 515-034.eps SxRXM SxTXP SxTXM D+ D- USB Bus SxRXP