LAN9353 Datasheet, PDF (264/523 Pages) Microchip Technology – Interfaces at up to 200Mbps via Turbo MII

LAN9353
10.7.2.9 Port x MAC Receive 1024 to Max Byte Count Register (MAC_RX_1024_TO_MAX_CNT_x)
Register #:
Port0: 0416h
Port1: 0816h
Port2: 0C16h
Size:
32 bits
This register provides a counter of received packets between the size of 1024 to the maximum allowable number bytes.
The counter is cleared upon being read.
Bits
Description
31:0 RX 1024 to Max Bytes
Count of packets (including bad packets) that have between 1024 and the
maximum allowable number of bytes. The max number of bytes is 1518 for
untagged packets and 1522 for tagged packets. If the Jumbo2K bit is set in
the Port x MAC Receive Configuration Register (MAC_RX_CFG_x), the max
number of bytes is 2048.
Note: This counter will stop at its maximum value of FFFF_FFFFh.
Minimum rollover time at 100 Mbps is approximately 5979 hours.
Type
RC
Default
00000000h
Note: A bad packet is defined as a packet that has an FCS or Symbol error. For this counter, a packet with the
maximum number of bytes that is not an integral number of bytes (e.g., a 1518 1/2 byte packet) is counted.
10.7.2.10 Port x MAC Receive Oversize Count Register (MAC_RX_OVRSZE_CNT_x)
Register #:
Port0: 0417h
Port1: 0817h
Port2: 0C17h
Size:
32 bits
This register provides a counter of received packets with a size greater than the maximum byte size. The counter is
cleared upon being read.
Bits
Description
31:0 RX Oversize
Count of packets that have more than the maximum allowable number of
bytes and a valid FCS. The max number of bytes is 1518 for untagged pack-
ets and 1522 for tagged packets. If the Jumbo2K bit is set in the Port x MAC
Receive Configuration Register (MAC_RX_CFG_x), the max number of
bytes is 2048.
Note: This counter will stop at its maximum value of FFFF_FFFFh.
Minimum rollover time at 100 Mbps is approximately 8813 hours.
Type
RC
Default
00000000h
Note: For this counter, a packet with the maximum number of bytes that is not an integral number of bytes (e.g.,
a 1518 1/2 byte packet) is not considered oversize.
DS00001925A-page 264
 2015 Microchip Technology Inc.