zl50409 Zarlink Semiconductor, zl50409 Datasheet - Page 60

• Manufacturer Part Number: zl50409
• Description: Managed 9-port 10/100m Ethernet Switch
• Manufacturer: Zarlink Semiconductor

11.4.1.11
Six different size groups – one counter for each:
Pkts64Octets
Pkts65to127Octets
Pkts128to255Octets
Pkts256to511Octets
Pkts512to1023Octets
Pkts1024to1518Octets
Counts both good and bad packets.
11.5
In addition to the statistics groups defined in previous sections, the ZL50409 has other statistics counters for its own
purposes. We have two counters for flow control – one counting the number of flow control frames received, and
another counting the number of flow control frames sent. We also have two counters, one for unicast frames sent,
and one for non-unicast frames sent. A broadcast or multicast frame qualifies as non-unicast. Furthermore, we
have a counter called “frame send fail.” This keeps track of FIFO under-runs, late collisions, and collisions that have
occurred 16 times.
Miscellaneous Counters
Packet Count for Different Size Groups
for any packet with size = 64 bytes
for any packet with size from 65 bytes to 127 bytes
or any packet with size from 128 bytes to 255 bytes
for any packet with size from 256 bytes to 511 bytes
for any packet with size from 512 bytes to 1023 bytes
for any packet with size from 1024 bytes to 1518 bytes
(to 1522 with VLAN tag; to BUF_LIMIT if enabled for this port)
Zarlink Semiconductor Inc.
ZL50409
60
Data Sheet