Altera cyclone V Technical Reference page 1362

cv_5v4
2016.10.28
Bit
16
vtfe
10
hpf
9
saf
Ethernet Media Access Controller
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Name
When set, this bit enables the MAC to drop VLAN
tagged frames that do not match the VLAN Tag
comparison. When reset, the MAC forwards all
frames irrespective of the match status of the VLAN
Tag.
Value
0x0 Forward all frames irrespective of the match
status of the VLAN tag
0x1 Drop VLAN tagged frames that do not match
the VLAN Tag comparison
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.
When this bit is low and the HUC or HMC bit is set,
the frame is passed only if it matches the Hash filter.
Value
0x0
0x1
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 RxStatus Word is set high.
When this bit is set high and the SA filter fails, the
MAC drops the frame. When this bit is reset, the
MAC forwards the received frame to the application
and with the updated SA Match bit of the RxStatus
depending on the SA address comparison.
Value
0x0
0x1
Description
Description
Description
Hash or Perfect Filter off
Hash or Perfect Filter on
Description
SA Filter Off
SA Filter On
17-147
MAC_Frame_Filter
Access Reset
RW 0x0
RW 0x0
RW 0x0
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