Texas Instruments AM335 Series Technical Reference Manual

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Notes for the Rx Statistics Summary:
1. “AND” is assumed horizontally across the table between all conditions which form the statistic (marked y or n) except where (y|y), meaning
“OR” is indicated. Parentheses are significant.
2. “-“ indicates conditions which are ignored in the formations of the statistic.
3. Statistics marked “Rx+Tx” are formed by summing the Rx and Tx statistics, each of which is formed independently.
4. The non-pause column refers to all MAC control frames (i.e. frames with length/type=88.08) with opcodes other than 0x0001. The pauseframe
column refers to MAC frames with the opcode=0x0001.
5. The multicast, broadcast and unicast columns in the table refer to non-MAC Control/non-pause frames (i.e. data frames).
6. “%” If either a MAC control frame or pause frame has a multicast or broadcast destination address then the appropriate statistics will be
updated.
7. “y^” Frame fragments are not counted if less than 8 bytes.
8. flow coll. are half-duplex collisions forced by the MAC to achieve flow-control. A collision will be forced during the first 8 bytes so should not
show in frame fragments. Some of the ‘-‘s in this column might in reality be ‘n’s.
9. The rx_overruns stat show above is for rx_mof_overruns and rx_sof_overruns added together.
Table 14-20. Tx Statistics Summary
Frame Type Frame Size (bytes) Event
MAC control Data Collision Type
Tx/
Frame/
1024 No Und
Paus
Tx Statistic Rx+
65- 128- 256- 512- > CRC Que Defe
Any Multi Broa
Oct
64 - Carri er-
e Uni- 2-
Tx
127 255 511 1023 1535 Error ued rred
(CP - d- Flow 1 16 Late
1535 er run
(MA cast 15
U) cast cast
C)
Good Tx Frames F Tx (y| y| y| y| y) (y| y| y| y| y| y| y) - - - - n n n - - n
Broadcast Tx
F Tx n (%| n y) n (y| y| y| y| y| y| y) - - - - n n n - - n
Frames
Multicast Tx
F Tx (y| %| y) n n y| y| y| y| y| y| y) - - - - n n n - - n
Frames
Pause Tx Frames F Tx y n n n n y n n n n n n - - - - - - - - - -
Collisions F Tx n (y| y| y| y) (y| y| y| y| y| y| y) - (+ + + + +) n - - -
Single Collision Tx
F Tx n (y| y| y| y) (y| y| y| y| y| y| y) - - y n n n n - - -
Frames
Multiple Collision
F Tx n (y| y| y| y) (y| y| y| y| y| y| y) - - n y n n n - - -
Tx Frames
Excessive
F Tx n (y| y| y| y) (y| y| y| y| y| y| y) - - n n y n n - - -
Collisions
Late Collisions F Tx n (y| y| y| y) n (y| y| y| y| y| y) - - - - - y - - - -
Deferred Tx
F Tx n (y| y| y| y) (y| y| y| y| y| y| y) - - n n n n n - y n
Frames
1220
Ethernet Subsystem SPRUH73H–October 2011–Revised April 2013
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Texas Instruments AM335 Series Specifications

General

Brand	Texas Instruments
Model	AM335 Series
Category	Computer Hardware
Language	English