DM8603EP DAVICOM [Davicom Semiconductor, Inc.], DM8603EP Datasheet - Page 76

• Manufacturer Part Number: DM8603EP
• Description: 10/100 Mbps 3-port Ethernet Switch Controller with MII / RMII Interface
• Manufacturer: DAVICOM [Davicom Semiconductor, Inc.]

Received Special Tag(CPU
judge the incoming port number of the frame. REG 10h.13h.[7] can enable this feature by setting to 1.
Transmitted Special Tag (Switch
Preliminary datasheet
DM8603-12-DS-P01
November 8, 2010
Beside, transmitted special tag is used to indicate source port number. CPU can use this message to
Byte 0/1:
Byte 2:
Byte 3:
Byte 0/1:
Byte 2:
Byte 3:
[7]
[6]
[5:3]
[2:0]
[7]
[6]
[5]
[4]
[3:2]
[1:0]
[1:0]
[15:0]
[15:0]
[7:2]
[7:0]
Special Tag Ether-Type (Default: 0x8086)
Reserved
ST_PMAP_en, ST_PMAP Enable
Reserved
ST_PMAP, Force to assign forwarding port map
Reserved
ST_CVLAN, Cross VLAN
0: This frame obeys VLAN boundary.
1: This frame can cross VLAN boundary.
ST_LRN_DIS, Disable learning
0: This frame will be learned
1: This frame will not be learned
ST_PRI_EN, ST_PRI Enable
ST_PRI, Priority Queue Number (0~3)
00: Queue 0
01: Queue 1
10: Queue 2
11: Queue 3
ST_TAG
00: Unmodified
01: Always Tagged
10: Always Untagged
11: Reserved
Special Tag Ether-Type (Default: 0x8086)
Reserved
ST_SPORT, Source Port Number (0~2)
Reserved
Switch) 4-byte Format:
CPU) 4-byte Format:
10/100 Mbps 3-port Ethernet Switch Controller with MII / RMII Interface
DM8603
76