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Ethernet Control and Status registers
372
NS9750 Hardware Reference
Receive carrier sense error counter (A060 06C8)
Incremented each time a false carrier is found during idle, as defined by a 1 on RX_ER
and an
0xE on RXD. The event is reported with the statistics generated on the next
received frame. Only one false carrier condition can be detected and logged between
frames.
Receive undersize packet counter (A060 06CC)
Incremented each time a frame is received that is less than 64 bytes in length,
contains a valid FCS, and is otherwise well-formed. This counter does not look at
range/length errors.
Receive oversize packet counter (A060 06D0)
Incremented each time a frame is received that exceeds 1518 bytes (non-VLAN) or
1522 bytes (VLAN), contains a valid FCS, and is otherwise well-formed. This counter
does not look at range/length errors. This counter is not incremented when a packet
is truncated because it exceeds the MAXF value.
Receive fragments counter (A060 06D4)
Incremented for each frame received that is less than 64 bytes in length and contains
an invalid FCS; this includes integral and non-integral lengths.
Receive jabber counter (A060 06D8)
Incremented for frames received that exceed 1518 bytes (non-VLAN) or 1522 bytes
(VLAN) and contain an invalid FCS, including alignment errors. This counter does not
D31:12 R Reset = Read as 0 Reserved
D11:00 R/W Reset = 0x000 RCSE
D31:12 R Reset = Read as 0 Reserved
D11:00 R/W Reset = 0x000 RUND
D31:12 R Reset = Read as 0 Reserved
D11:00 R/W Reset = 0x000 ROVR
D31:12 R Reserved
D11:00 R/W Reset = 0x000 RFRG