High Performance Two Port 10/100 Managed Ethernet Switch with
Datasheet
14.5.2.19Port x MAC Receive Packet Length Count Register (MAC_RX_PKTLEN_CNT_x)Register #: | Port0: 0420h | Size: | 32 bits | |
| Port1: | 0820h |
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| Port2: | 0C20h |
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This register provides a counter of total bytes received. The counter is cleared upon being read.
BITS | DESCRIPTION | TYPE | DEFAULT |
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31:0 | RX Bytes | RC | 00000000h |
| Count of total bytes received (including bad packets). |
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| Note: This counter will stop at its maximum value of FFFF_FFFFh. |
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| Minimum rollover time at 100Mbps is approximately 5.8 hours. |
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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 Register (MAC_RX_CFG_x).
Note: 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.
Revision 1.4 | 340 | SMSC LAN9312 |
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