LAN9353 Datasheet, PDF (261/523 Pages) Microchip Technology – Interfaces at up to 200Mbps via Turbo MII

LAN9353
10.7.2.3 Port x MAC Receive Undersize Count Register (MAC_RX_UNDSZE_CNT_x)
Register #:
Port0: 0410h
Port1: 0810h
Port2: 0C10h
Size:
32 bits
This register provides a counter of undersized packets received by the port. The counter is cleared upon being read.
Bits
Description
31:0 RX Undersize
Count of packets that have less than 64 byte and a valid FCS.
Note: This counter will stop at its maximum value of FFFF_FFFFh.
Minimum rollover time at 100 Mbps is approximately 115 hours.
Type
RC
10.7.2.4 Port x MAC Receive 64 Byte Count Register (MAC_RX_64_CNT_x)
Default
00000000h
Register #:
Port0: 0411h
Port1: 0811h
Port2: 0C11h
Size:
32 bits
This register provides a counter of 64 byte packets received by the port. The counter is cleared upon being read.
Bits
Description
31:0 RX 64 Bytes
Count of packets (including bad packets) that have exactly 64 bytes.
Note: This counter will stop at its maximum value of FFFF_FFFFh.
Minimum rollover time at 100 Mbps is approximately 481 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 that is not
an integral number of bytes is rounded down to the nearest byte.
 2015 Microchip Technology Inc.
DS00001925A-page 261