Altera cyclone V Technical Reference page 1552

cv_5v4
2016.10.28
Bit
10:6
l3hsbm1
5
l3daim1
4
l3dam1
3
l3saim1
2
l3sam1
0
l3pen1
Ethernet Media Access Controller
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Name
IPv4 Frames: This field contains the number of lower
bits of IP Source Address that are masked for
matching in the IPv4 frames. The following list
describes the values of this field: * 0: No bits are
masked. * 1: LSb[0] is masked. * 2: Two LSbs [1:0] are
masked. * ... * 31: All bits except MSb are masked.
IPv6 Frames: This field contains Bits [4:0] of the field
that indicates the number of higher bits of IP Source
or Destination Address matched in the IPv6 frames.
This field is valid and applicable only if L3DAM1 or
L3SAM1 is set high.
When set, this bit indicates that the Layer 3 IP
Destination Address field is enabled for inverse
matching. When reset, this bit indicates that the Layer
3 IP Destination Address field is enabled for perfect
matching. This bit is valid and applicable only when
Bit 4 (L3DAM1) is set high.
When set, this bit indicates that Layer 3 IP Destina‐
tion Address field is enabled for matching. When
reset, the MAC ignores the Layer 3 IP Destination
Address field for matching. Note: When Bit 1
(L3PEN1) is set, you should set either this bit or Bit 2
(L3SAM1) because either IPv6 DA or SA can be
checked for filtering.
When set, this bit indicates that the Layer 3 IP Source
Address field is enabled for inverse matching. When
reset, this bit indicates that the Layer 3 IP Source
Address field is enabled for perfect matching. This bit
is valid and applicable only when Bit 2 (L3SAM1) is
set high.
When set, this bit indicates that the Layer 3 IP Source
Address field is enabled for matching. When reset, the
MAC ignores the Layer 3 IP Source Address field for
matching. Note: When Bit 0 (L3PEN1) is set, you
should set either this bit or Bit 4 (L3DAM1) because
either IPv6 SA or DA can be checked for filtering.
When set, this bit indicates that the Layer 3 IP Source
or Destination Address matching is enabled for the
IPv6 frames. When reset, this bit indicates that the
Layer 3 IP Source or Destination Address matching is
enabled for the IPv4 frames. The Layer 3 matching is
done only when either L3SAM1 or L3DAM1 bit is set
high.
Description
17-337
L3_L4_Control1
Access Reset
RW 0x0
RW 0x0
RW 0x0
RW 0x0
RW 0x0
RW 0x0
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