MTD508 Myson Technology, MTD508 Datasheet - Page 13

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

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INTERNAL MII REGISTERS
The MTD508 implements 10 MII global registers and 4-per-dot registers, defined as the following tables:
Table 1. MII Registers
Reg No.
0
1
2
3
4
5
6
15-13
12-9
15-8
15-0
15-0
15-0
15-9
8-0
7-0
7-0
Bit
8
Myson-Century Technology
Uplink Reg0
Uplink Reg1
StsReg0
CtlReg0
CtlReg1
CtlReg2
CtlReg3
CtlReg4
CtlReg5
Name
XOFF
Aging
XON
RO/RC
R/W
R/W
R/W
R/W
R/W
R/W
R/W
bit[0]: 1
bit[1]: 1
bit[2]: 1
bit[3]: 1
bit[4]: 1
bit[5]: reserved;
bit[6]: reserved;
bit[7]: reserved;
bit[8]: 1
Scan mode select 3-0.
Scan port select.
XON threshold.
XOFF threshold.
While EEPROM is enabled, this register’s content will be
updated by EEPROM read XON/XOFF threshold data
automatically. After EEPROM read is done, this register
can be read/write by management cmd. The default value
is “16h3084” (2M memory) or “16h1838” (1M memory).
bit[15:0] can specify aging time.
While EEPROM is enabled, this register’s content will be
updated by EEPROM read Aging timer data automatically.
After EEPROM read is done, this register can be read/write
by management cmd.
bit[15:12] specify uplink port ID of port 3;
bit[11:8] specify uplink port ID of port 2;
bit[7:4] specify uplink port ID of port 1;
bit[3:0] specify uplink port ID of port 0.
The default value is “16h000f”.
Note: The write sequence of this register is Jumper setting
bit[15:12]: reserved;
bit[11:8]: reserved;
bit[7:4]: reserved;
bit[3:0]: specify port ID of port 4.
The default value is “16h0”.
Note: The write sequence of this register is Jumper setting
bit[7:0]: specify broadcast threshold.
bit[8]: enable enhance backpressure.
Reserved.
Note: this register can be written by EEPROM content or
Global Registers
MII management command.
EEPROM content
EEPROM content
switch to port 0 registers;
switch to port 1 registers;
switch to port 2 registers;
switch to port 3 registers;
switch to port 4 registers;
switch to global registers.
Control Register 0
Control Register 1
Control Register 2
Control Register 3
Control Register 4
Control Register 5
Status Register 0
Description
MII management command.
MII management command.
MTD508
page 13 of 19
16h3084
16h000f
16’d300
Default
9h100
16h0
16hff