Packets received with a particular channel address must begin with a valid SOP and end
with a valid EOP. If an SOP is detected without receiving an EOP for the previous
packet, this signal is asserted for a single Local bus clock cycle. Additionally, the
extra SOP is deleted, the packets are merged together, and an error is signaled with the
EOP by the RX_ERROUT signal.
This signal is available as a status signal to indicate a missing EOP error condition occurred and that SOP deletion occurred. No indication is provided on the Local bus which packet is actually a merged packet. The packet is marked as containing an error. This is because a missing EOP is almost always associated with other errors that cannot be associated with a particular packet.
The purpose of SOP deletion is to ensure that packets for a particular channel are always
delivered on the RX Local bus beginning with an SOP and ending with an EOP to remove the
need for user logic to perform bus protocol checking. The
STAT_RX_MEOP_ERR status signal indicates that this function is
being performed and for most applications can be ignored.