DM9016
3-port switch with Processor Interface
6.60 Ethernet Address Control / Status Register 2 (77H)
Bit
7
6
Name
RESERVED
OVERRIDE
Default
0,RO
Description
Reserved
PH0,RW When writing table, this bit can set the entry to override the port’s setting in the
receiving disable state of STP. When reading table, it indicates the entry is override
one or not. This bit supports unicast and multicast address table both.
0: Entry is normal one.
1: Entry is override one.
5
4
IGMPE
PH0,RO When reading multicast address table, this bit indicated the entry is IGMP entry or
not.
0: Non-IGMP entry
1: IGMP entry
EA_STATIC
PH0,RW When writing unicast address table, this bit can be used to set the entry as static or
dynamic. When reading unicast address table, it indicates the entry is static or
dynamic.
0: Entry is dynamic.
1: Entry is static, never be age-out
3:0
PORT
PH0,RW Forwarding Port Number (0~3), when access Unicast Address Table.
Forwarding Port Mapping {uP, P2, P1, P0}, when access Multicast Address Table.
6.61 Snooping Control Register 1 (78H)
Bit
7
6:5
Name
RESERVED
UIPMPC
Default
0,RO
Description
Reserved
PH0,RW Unregistered IP Multicast Packet Control
The IP multicast packet with a destination address which does not match any of
groups announced in earlier IGMP Membership Reports, i.e. not found in the
IGMP membership table.
00: As normal multicast packets
01: Dropped.
10: Force forward to processor port.
11: Forward to all ports except incoming & uP port.
PH0,RW User-defined IGMP Router Port Configuration Enable
0: Disable, the router portmap is automatic manipulation via IGMP snooping.
1: Enable, the router portmap is static defined by user.
PH0,RW IGMP Packet Forward to uP Port only when Software-IGS
PH0,RW IGMP Packet Forward to uP Port also when Hardware-IGS
0: IGMP packet doesn’t forwards to processor port when Hardware based
IGMP Snooping is enabled.
4
UD_IGR
3
2
SIGS2UP
HIGS2UP
1: IGMP packet also forwards to processor port when Hardware based IGMP
Snooping is enabled.
1
0
SIGS_EN
IGS_EN
PH0,RW Software-based IGMP Snooping Enable
0: Hardware based IGMP Snooping, without software intervention. (default)
1: Software based IGMP Snooping
PH0,RW IGMP Snooping Enable
0: Disable
1: Enable
Preliminarydatasheet
DM9016-13-DS-P01
March 26, 2009
37
DAVICOM [ DAVICOM SEMICONDUCTOR, INC. ]
