LAN9353 Datasheet, PDF (269/523 Pages) Microchip Technology – Interfaces at up to 200Mbps via Turbo MII

LAN9353
10.7.2.19 Port x MAC Receive Packet Length Count Register (MAC_RX_PKTLEN_CNT_x)
Register #:
Port0: 0420h
Port1: 0820h
Port2: 0C20h
Size:
32 bits
This register provides a counter of total bytes received. The counter is cleared upon being read.
Bits
Description
31:0 RX Bytes
Count of total bytes received (including bad packets).
Note: This counter will stop at its maximum value of FFFF_FFFFh.
Minimum rollover time at 100 Mbps is approximately 5.8 hours.
Type
RC
Default
00000000h
Note:
Note:
If necessary, for oversized packets, the packet is either truncated at 1518 bytes (untagged, Jumbo2K=0),
1522 bytes (tagged, Jumbo2K=0) or 2048 bytes (Jumbo2K=1). If this occurs, the byte count recorded is
1518, 1522 or 2048, respectively. The Jumbo2K bit is located in the Port x MAC Receive Configuration Reg-
ister (MAC_RX_CFG_x).
A bad packet is one that has an FCS or Symbol error. For this counter, a packet that is not an integral number
of bytes (e.g. a 1518 1/2 byte packet) is rounded down to the nearest byte.
10.7.2.20 Port x MAC Receive Good Packet Length Count Register (MAC_RX_GOODPKTLEN_CNT_x)
Register #:
Port0: 0421h
Port1: 0821h
Port2: 0C21h
Size:
32 bits
This register provides a counter of total bytes received in good packets. The counter is cleared upon being read.
Bits
Description
31:0 RX Good Bytes
Count of total bytes received in good packets (proper length and free of
errors).
Note: This counter will stop at its maximum value of FFFF_FFFFh.
Minimum rollover time at 100 Mbps is approximately 5.8 hours.
Note: A bad packet is one that has an FCS or Symbol error.
Type
RC
Default
00000000h
 2015 Microchip Technology Inc.
DS00001925A-page 269