TM4C129ENCPDT Datasheet, PDF (1603/2014 Pages) Texas Instruments – Tiva Microcontroller

Tiva^™ TM4C129ENCPDT Microcontroller
Bit/Field
10
9
8
Name
HPF
SAF
SAIF
Type
RW
RW
RW
Reset
0
Description
Hash or Perfect Filter
When this bit is set, it configures the address filter to pass a frame if it
matches either the perfect filtering or the hash filtering as set by the HMC
or HUC bits in this register.
When this bit is clear and the HUC or HMC bit is set, the frame is passed
only if it matches the Hash filter.
Value Description
0 Address filter passes a frame if it matches perfect filtering or
hash filtering.
1 Address filter passes a frame only if it matches in the hash filter.
0
Source Address Filter Enable
When this bit is set, the MAC compares the SA field of the received
frames with the values programmed in the enabled SA registers. If the
comparison matches, then the SA match bit of Receive Status Word is
set. When SA Match bit is set and the SA filter fails, the MAC drops the
frame.
When this bit is clear, the MAC forwards the received frame to the
application with the updated SA Match bit of the Receive Status Word
depending on the SA address comparison.
Value Description
0 Source address filter disabled.
1 Source address filter enabled.
0
Source Address (SA) Inverse Filtering
When this bit is set, the Address Check block operates in inverse filtering
mode for the SA address comparison. The frames whose SA matches
the SA registers are marked as failing the SA address filter.
When this bit is reset, frames whose SA does not match the SA registers
are marked as failing the SA Address filter.
Value Description
0 Frames whose SA does not match the SA registers are marked
as failing.
1 Frames whose SA matches the SA registers are marked as
failing.
June 18, 2014
Texas Instruments-Production Data
1603