
Agere Systems Inc.
113
Data Sheet
July 2001
T8302 Internet Protocol Telephone
Advanced RISC Machine (
ARM
)
10 Ethernet 10/100 MAC
(continued)
Table 90. MAC Receive Control FIFO Register
(continued)
Bit #
Name
25
LONG
Frame long error (active-high).
Indicates that the received packet’s length was greater than
1518 bytes, and the packet had good
CRC
.
Description
Valid on the positive edge of
RX_CLK
.
Received physical address (active-high).
Indicates that the first bit of the received packet
was 0, and that at least 6 bytes of data were received.
24
PHYS
Valid on the positive edge of
RX_CLK
.
Received multicast address.
Indicates that the first bit of the received packet was 1, all
address bits were not 1, and that at least 6 bytes of data were received.
23
MULT
Valid on the positive edge of
RX_CLK
.
Received broadcast address. Indicates that all 48 address bits of a received frame are 1.
22
BROAD
Valid on the positive edge of
RX_CLK
.
MAC control frame received.
Indicates that the last packet received was a valid MAC control
frame.
21
RCNTRL
Valid on the positive edge of
RX_CLK
.
Unsupported opcode received.
Indicates that the last MAC control frame received had an
unsupported opcode.
20
RUNSUP
Valid on the positive edge of
RX_CLK
.
PAUSE frames received.
Indicates that the last control frame received has a multicast
address, length/type field, and opcode for the pause operation.
19
RPAUSE
Valid on the positive edge of
RX_CLK
.
RX_VLAN2 VLAN type2 frame.
When this signal is set, the current reception is tagged with a VLAN
type2 ID. The thirteenth and fourteenth bytes at the frame are compared to the
VLAN type2
type/length field register
.
18
This signal is set if there is a nonzero match.
RX_VLAN1 VLAN type1 frame.
When this signal is set, the current reception is tagged with a VLAN
type1 ID. The thirteenth and fourteenth bytes at the frame are compared to the
VLAN type1
type/length field register
.
17
This signal is set if there is a nonzero match.
RXEROUT Receive error output (active-high).
Active from
RXEOP
of an incoming frame to
RXSOP
of
the next frame, synchronous with
RXC
.
RXEOP
can be used to strobe
RXEROUT
.
RXEROUT
will activate if the
RX_ERR
input from the MII activates for one or more clocks
while
RX_DV
is high.
RXCOUNT Receive byte count.
Receive byte count at end of packet.
16
15:0
Read-only.