1
0
1s116
31
1
Figure 19-28. Group Address Hash Tables
1-4
(EMACO_GAHT1-EMACO_GAHT4)
Reserved
Group Address Hash Number
19.7.15 Last Source Address High (EMACO_LSAH)
EMACO_LSAH contains the high-order halfword of the source address of the last "good" received
packet. The packet is considered to be
"good" if EMAC is programmed to provide this packet to MAL.
1
0
1s116
31
1
Figure 19-29. Last Source Address High Register (EMACO_LSAH)
Reserved
Last Source Address High-Order
Halfword
19.7.16 Last Source Address Low (EMACO_LSAL)
EMACO_LSAL contains the low-order word of the source address of the last "good" received packet.
The packet is considered
"good" if EMAC is programmed to provide this packet to MAL.
1
0
31
1
Figure 19-30. Last Source Address Low Register (EMACO_LSAL)
'I
0:31
1 Last Source Address Low-Order Word
19.7.17 Inter-Packet Gap Value Register (EMACO_IPGVR)
EMACO_IPGVR contains the value of one-third of the,inter-packet gap (IPG) for the next packet to be
transmitted.
("Frame" is synonymous with "packet.")
The resolution of each bit is 8-bit times. The minimum value
in
the register is four, causing a minimum
IPG period of 96-bit times).
19-38 PPC40SGP User's Manual Preliminary
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