Receive and transmit polarity is user selectable and affects all modes of
operation.
The idle level is programmable with the
TXPOL and
RXPOL polarity control bits. Both control bits default to
‘
0’, which selects a high idle level for transmit
and receive. The low level Idle state is selected by setting the control bit to
‘
1’. TXPOL controls the TX idle level. RXPOL
controls the RX idle level.