MTD508 Myson Technology, MTD508 Datasheet - Page 11

• Manufacturer Part Number: MTD508
• Description: 8-port Switch
• Manufacturer: Myson Technology

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Port Based VLAN
The MTD508 supports VLAN configuration by port based methodology. One port selects the certain ports to form
its VLAN group by configuring the VLAN register. The packet (including broadcast packet) is not forwarded to the
destination port whose VLAN group is different from the source port.
Port Trunking
The port trunking function can also be implemented by VLAN registers. One trunk port isolates the packeting
transmitting and receiving from the other trunk ports, which perform a logical trunk topology. The non-trunk port
should choose only one trunk port for transmitting, which can achieve the load balancing and maintain the packet
sequences.
Memory Interface
Two kinds of external memory interfaces can be selected by user, namely 1Mbyte memory (256K32 x 1) and
2Mbyte (256K32 x 2 or 512K x 1). Maximum 2Mbyte external memory can be used for packet buffering. “-10”
speed grade of SGRAM/SDRAM device is recommended. The following table is the SGRAM application pin
connection:
System Control
Broadcast TH
StaticSA1
StaticSA2
Reserved
UpLink10
UpLink32
UpLink54
Reserved
Reserved
Xon TH
Xoff TH
DisPort
Name
Myson-Century Technology
EEPROM
Address
14 - 1f
20 -26
27 -2d
0a
0b
0c
0d
0e
10
12
13
11
0f
Reserved
bit[7:4]
bit[3:0]
*ex1: bit[7:4] = ‘oo11’b, it means that if the incoming packet of
*ex2: bit[3:0] = ‘0111’b, it means that if the incoming packet of
(Note: Setting value to “4hf” means flooding to all the other
bit[7:4]
bit[3:0]
(Note: setting value to “4hf” means flooding to all ports; setting
bit[7:4]
bit[3:0]
(Note: Setting value to “f” means flooding to all the other ports;
Reserved
Broadcast threshold
Xon threshold
Xoff threshold
Disable Port
System control byte:
bit[0]
bit[7:1]
None
Address 26 bit[2:0]
Address 25 bit [7:0] ~ Address 20 bit[7:0]
Address 2d bit[2:0]
Address 2c bit [7:0] ~ Address 20 bit[7:0]
Port1 gets the “un-routed” result, then this incoming
packet will be flooded to Port3.
Port0 gets the “un-routed” result, then this incoming
packet will be flooded to Port7.
ports; setting value to “4h8” to “4he” is forbidden.)
value to “4h8” to “4he” is forbidden.)
setting value to “8” to “h” is forbidden.)
enhanced back pressure enable;
the flooding port_no of Port1;
the flooding port_no of Port0.
the flooding port_no of Port3;
the flooding port_no of Port2.
reserved;
the flooding port_no of Port4.
reserved.
EEPROM Content Description
Port ID;
Port ID;
static SA[47:0].
static SA[47:0].
Value Under Basic
Recommended
MTD508
Operation
page 11 of 19
8h00
8h00
8h00
8h74
8h30
8h00
8h00
8h7f
8h0f
8hff