The Statistics counters are defined to be either 32 or 64 bits wide with 64 bits set as the default. When defined as 64 bits wide, the counter values are captured across two registers. In all cases, a read of the lower 32-bit value causes the upper 32 bits to be sampled. A subsequent read of the upper 32-bit location returns this sampled value.
Note: If a different upper 32-bit location is read, an error is
returned.
| Name | Increment Bit No. | Address | Description |
|---|---|---|---|
| Received bytes | NA | 0x200-0x204 | A count of bytes of frames received (destination address to frame check sequence inclusive). |
| Transmitted bytes | NA | 0x208-0x20C | A count of bytes of frames transmitted (destination address to frame check sequence inclusive). |
| RX Undersize frames | NA | 0x210-0x214 | A count of the number of frames received that were fewer than 64 bytes in length but otherwise well formed. |
| RX Fragment frames | NA | 0x218-0x21C | A count of the number of frames received that were fewer than 64 bytes in length and had a bad frame check sequence field. |
| RX 64-byte Frames | 4 | 0x220-0x224 | A count of error-free frames received 64 bytes in length. |
| RX 65-127-byte Frames | 5 | 0x228-0x22C | A count of error-free frames received between 65 and 127 bytes in length. |
| RX 128-255-byte Frames | 6 | 0x230-0x234 | A count of error-free frames received between 128 and 255 bytes in length. |
| RX 256-511-byte Frames | 7 | 0x238-0x23C | A count of error-free frames received between 256 and 511 bytes in length. |
| RX 512-1023-byte Frames | 8 | 0x240-0x244 | A count of error-free frames received between 512 and 1023 bytes in length. |
|
RX 1024-MaxFrameSize byte Frames |
9 | 0x248-0x24C | A count of error-free frames received between 1024 bytes and the specified IEEE 802.3-2008 maximum legal length. |
| RX Oversize Frames | 10 | 0x250-0x254 | A count of otherwise error-free frames received that exceeded the maximum legal frame length specified in IEEE 802.3-2008. If Jumbo frames are enabled this counter increments when the received frame length exceeds the maximum legal length. If Jumbo frames are not enabled, it increments only if the received frame length is greater than the maximum legal length and less than or equal to the value specified in RX Maximum Frame Configuration Register |
| TX 64-byte Frames | 11 | 0x258-0x25C | A count of error-free frames transmitted that were 64 bytes in length. |
| TX 65-127-byte Frames | 12 | 0x260-0x264 | A count of error-free frames transmitted between 65 and 127 bytes in length. |
| TX 128-255-byte Frames | 13 | 0x268-0x26C | A count of error-free frames transmitted between 128 and 255 bytes in length. |
| TX 256-511-byte Frames | 14 | 0x270-0x274 | A count of error-free frames transmitted between 256 and 511 bytes in length. |
| TX 512-1023-byte Frames | 15 | 0x278-0x27C | A count of error-free frames transmitted that were between 512 and 1023 bytes in length. |
|
TX 1024-MaxFrameSize byte Frames |
16 | 0x280-0x284 | A count of error-free frames transmitted between 1024 and the specified IEEE 802.3-2008 maximum legal length. |
| TX Oversize Frames | 17 | 0x288-0x28C | A count of otherwise error-free frames transmitted that exceeded the maximum legal frame length specified in IEEE 802.3-2008. |
| RX Good Frames | 18 | 0x290-0x294 | A count of error-free frames received. |
|
RX Frame Check Sequence Errors |
19 | 0x298-0x29C | A count of received frames that failed the CRC check and were at least 64 bytes in length. |
| RX Good Broadcast Frames | 20 | 0x2A0-0x2A4 | A count of frames successfully received and directed to the broadcast group address. |
| RX Good Multicast Frames | 21 | 0x2A8-0x2AC | A count of frames successfully received and directed to a non-broadcast group address. |
| RX Good Control Frames | 22 | 0x2B0-0x2B4 | A count of error-free frames received that contained the special control frame identifier in the length/type field. |
|
RX Length/Type Out of Range |
23 | 0x2B8-0x2BC | A count of frames received that were at least 64 bytes in length where the length/type field contained a length value that did not match the number of MAC user data bytes received. The counter also increments for frames in which the length/type field indicated that the frame contained padding but where the number of MAC user data bytes received was greater than 64 bytes (minimum frame size). The exception is when the Length/Type Error Checks are disabled in the chosen MAC, in this case, the counter does not increment. |
|
RX Good VLAN Tagged Frames |
24 | 0x2C0-0x2C4 | A count of error-free VLAN frames received. This counter only increments when the receiver is configured for VLAN operation. |
| RX Good Pause Frames | 25 | 0x2C8-0x2CC | A count of error-free frames received that contained the MAC Control type identifier 88-08 in the length/type field, contained a destination address that matches either the MAC Control multicast address or the configured source address of the MAC, the PAUSE opcode, and were acted upon by the MAC. |
| RX Bad Opcode | 26 | 0x2D0-0x2D4 | A count of error-free frames received that contained the MAC Control type identifier 88-08 in the Length/Type field but were received with an opcode other than the PAUSE (legacy) opcode or the Priority Flow Control opcode (when the core is generated with Priority Flow Control support). |
| TX Good Frames | 27 | 0x2D8-0x2DC | A count of error-free frames transmitted. |
| TX Good Broadcast Frames | 28 | 0x2E0-0x2E4 | A count of error-free frames that were transmitted to the broadcast address. |
| TX Good Multicast Frames | 29 | 0x2E8-0x2EC | A count of error-free frames that were transmitted to a group destination address other than broadcast. |
| TX Good Underrun Errors | 30 | 0x2F0-0x2F4 | A count of frames that would otherwise be transmitted by the core but could not be completed due to the assertion of TX_UNDERRUN during the frame transmission. |
| TX Good Control Frames | 31 | 0x2F8-0x2FC | A count of error-free frames transmitted that contained the MAC Control Frame type identifier 88-08 in the length/type field. |
|
TX Good VLAN Tagged Frames |
32 | 0x300-0x304 | A count of error-free VLAN frames transmitted. This counter only increments when the transmitter is configured for VLAN operation. |
| TX Good Pause Frames | 33 | 0x308-0x30C | A count of error-free PAUSE frames generated and transmitted by the MAC in response to an assertion of pause_req. |
| TX Single Collision Frames | 34 | 0x310-0x314 | A count of frames involved in a single collision but subsequently transmitted successfully (half-duplex mode only). |
| TX Multiple Collision Frames | 35 | 0x318-0x31C | A count of frames involved in more than one collision but subsequently transmitted successfully (half-duplex mode only). |
| TX Deferred | 36 | 0x320-0x324 | A count of frames whose transmission was delayed on its first attempt because the medium was busy (half-duplex mode only). |
| TX Late Collisions | 37 | 0x328-0x32C | A count of the times that a collision has been detected later than one slot Time from the start of the packet transmission. A late collision is counted twice—both as a collision and as a late Collision (half-duplex mode only). |
| TX Excess Collisions | 38 | 0x330-0x334 | A count of the frames that, due to excessive collisions, are not transmitted successfully (half-duplex mode only). |
| TX Excess Deferral | 39 | 0x338-0x33C | A count of frames that deferred transmission for an excessive period of time (half-duplex mode only). |
| RX Alignment Errors | 40 | 0x340-0x344 | Asserted for received frames of size 64-bytes and greater which contained an odd number of received nibbles and which also contained an invalid FCS field (half-duplex mode only). |
| TX Good PFC Frames | 41 | 0X348-0X34C | A count of error-free frames transmitted that contained the MAC Control Frame type identifier 88-08 in the length/type field and PFC opcode 01-01. |
| RX Good PFC Frames | 42 | 0X350-0X354 | A count of error-free frames received that contained the MAC Control type identifier 88-08 in the length/type field, a destination address that matched either the MAC Control multicast address or the configured source address of the MAC, the PFC opcode, and were acted upon by the MAC. |
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