This field maintains
the upper 16 bits of the 32-bit count of the number of PLCA transmit opportunities the
device may have utilized since the previous read.Note: When this register is read, the
contents of the 32-bit transmit opportunity counter will be latched into the high and
low counter register pair. The high counter register will be updated prior to be
driven to the station management entity host controller.
Note: The 32-bit counter will be reset when
the contents are latched into the high and low counter register
pair.
