
DescriptionR/WNameBit(s)
Statistics counters reset. Set this bit to 1 to clear the statistics
counters. The MAC function clears this bit when the reset
sequence completes.
RWCNT_RESET31
Statistics Counters (Dword Offset 0x18 – 0x38)
Table 6-4 describes the read-only registers that collect the statistics on the transmit and receive datapaths.
A hardware reset clears these registers; a software reset also clears these registers except aMacID.
The register description uses the following definitions:
• Good frame—error-free frames with valid frame length.
• Error frame—frames that contain errors or whose length is invalid.
• Invalid frame—frames that are not addressed to the MAC function. The MAC function drops this frame.
Table 6-4: Statistics Counters
DescriptionR/WNameDword
Offset
The MAC address. This register is wired to the primary MAC
address in the mac_0 and mac_1 registers.
ROaMacID0x18
–
0x19
The number of frames that are successfully transmitted
including the pause frames.
ROaFramesTransmittedOK0x1A
The number of frames that are successfully received including
the pause frames.
ROaFramesReceivedOK0x1B
The number of receive frames with CRC error.ROaFrameCheck
SequenceErrors
0x1C
The number of receive frames with alignment error.ROaAlignmentErrors0x1D
The number of data and padding octets that are successfully
transmitted.
This register contains the lower 32 bits of the aOctetsTrans-
mittedOK counter. The upper 32 bits of this statistics counter
reside at the dword offset 0x0F.
ROaOctetsTransmittedOK0x1E
The number of data and padding octets that are successfully
received.
The lower 32 bits of the aOctetsReceivedOK counter. The
upper 32 bits of this statistics counter reside at the dword offset
0x3D.
ROaOctetsReceivedOK0x1F
The number of pause frames transmitted.ROaTxPAUSEMACCtrlFrames0x20
The number received pause frames received.ROaRxPAUSEMACCtrlFrames0x21
The number of errored frames received.ROifInErrors0x22
Altera Corporation
Configuration Register Space
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6-11
Statistics Counters (Dword Offset 0x18 – 0x38)
UG-01008
2014.06.30
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