IXF1104
8.4.3MAC TX Statistics Register Overview
The MAC TX Statistics registers contain all the MAC transmit statistic counters and are cleared when read. The software must poll these registers to accumulate values and to ensure that the counters do not wrap. The
Table 94 covers all four MAC ports TX statistics. Port_Index is the port number (0, 1, 2, or 3).
Table 94. MAC TX Statistics ($ Port_Index +0x40 – +0x58) (Sheet 1 of 4)
Name | Description | Address | Type1 | Default | |
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| Counts the bytes transmitted in all legal |
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| frames. The count includes all bytes |
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| from the destination MAC address to |
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| and including the CRC. The initial | Port_Index + |
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OctetsTransmittedOK | preamble and SFD bytes are not | R | 0x00000000 | ||
0x40 | |||||
| counted. Any initial collided |
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| transmission attempts before a |
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| successful frame transmission do not |
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| add to this counter. |
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| Counts the bytes transmitted in all bad |
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| frames. The count includes all bytes |
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| from the destination MAC address to |
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| and including the CRC. The initial |
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| preamble and SFD bytes are not |
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| counted. |
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| Late collision counted: The count is |
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| close to the actual number of bytes |
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| transmitted before the frame is |
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| discarded. |
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| Excessive collision counted: The count |
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OctetsTransmittedBad | is close to the actual number of bytes | Port_Index + | R | 0x00000000 | |
transmitted before the frame is | 0x41 | ||||
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| discarded. |
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| TX |
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| expected to match the number of bytes |
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| actually transmitted before the frame is |
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| discarded. |
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| TX CRC error counted: All bytes not |
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| sent with success are counted by this |
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| counter. |
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| Any initial collided transmission |
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| attempts before a successful frame |
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| transmission do not add to this counter. |
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TxUCPkts | The total number of unicast packets | Port_Index + | R | 0x00000000 | |
transmitted (excluding bad packets). | 0x42 | ||||
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| The total number of multicast packets |
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| transmitted (excluding bad packets). |
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| NOTE: This count includes pause |
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| control packets, which are also |
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TxMCPkts | counted in the | Port_Index + | R | 0x00000000 | |
TxPauseFrames Counter. | 0x43 | ||||
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| Thus, these types of packets |
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| are counted twice. Take care |
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| when summing register counts |
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| for reporting MIB information. |
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1. RO = Read Only, No clear on Read; R = Read, Clear on Read; W = Write only; R/W = Read/Write, No clear; R/W/C = Read/Write, Clear on Write
Datasheet | 177 |
Document Number: 278757
Revision Number: 007
Revision Date: March 25, 2004
