參數(shù)資料
型號(hào)： MTD505
廠商： Electronic Theatre Controls, Inc.
英文描述： 5 Port 10M/100M Ethernet Switch
中文描述： 5端口10M/100M以太網(wǎng)交換機(jī)
文件頁(yè)數(shù)： 12/19頁(yè)
文件大?。?/td> 202K
代理商： MTD505
12/19
MTD505 Revision 1.2 14/04/2000
MTD505
(Preliminary)
MYSON
TECHNOLOGY
3.11 Port Trunking
The port trunking function can also be implemented by VLAN registers. One trunk port isolates the
packet transmitting and receiving from the other trunk ports, which performs a logical trunk topology.
The non-trunk port should choose only one trunk port for transmitting, which can achieve the load bal-
ancing and maintain the packet sequences.
3.12 Memory Interface
Two kinds of external memory interface can be selected by user -- 1M byte memory (256K32 x 1) and 2
M bytes (256K32 x 2 or 512K32 x 1). Maximum 2M byte external memory can be used for packet buff-
ering. “-10 “ speed grade of SGRAM/SDRAM device is recommanded. The following table is the
SGRAM application pin connection :
Memory
Chip No
256K32
x 1
A8
CS0B
256K32
x 2
A8
CS0B
512K32
x 1
A9
CS0B
3.13 Internal MII Registers Acess and Control
The MTD505 support 2 serial pins (SDIO/SDC) for internal registers acess and control; The detailed
registers informations are presented in Section4.0 (Internal MII Registers).
3.14 LED Display
The MTD505 use 10 pins to output 2 kinds of LED display -- LEDDATA[7:0], LEDCLK1, LEDCLK2.
Using LEDCLK1 rising edge, LEDDATA[7:0] report Port7~0 link/receive activity led status. Using
LEDCLK2 rising edge, LEDDATA[4:0] report packet buffer utilization rating, and LEDDATA[7] report
external memory test result(after power reset, MTD505 will test external SDRAM automatically), LED-
DATA[6] report the buffer almost full alarm signal .
4.0 Internal MII Registers
The MTD505 implements
10
MII global registers and 4 per port registers, define as following tables:
TABLE 1. MII registers
GLOBAL REGISTERS
Memory Type
A[8]
CS0B
CS1B
NC
CS1B
A8
REG
NO
0
Bits
Name
R/W
Descriptions
Default
CtlReg0
R/W
CONTROL REGISTER 0
8-0
bit[0] = 1 --> switch to port 0 registers
bit[1] = 1 --> switch to port 1 registers
bit[2] = 1 --> switch to port 2 registers
bit[3] = 1 --> switch to port 3 registers
bit[4] = 1 --> switch to port 4 registers
bit[5] = reserved
bit[6] = reserved
bit[7] = reserved
bit[8] = 1 --> switch to global registers
scan mode select 3-0
Scan port select
CONTROL REGISTER 1
9’h100
12-9
15-13
1
CtlReg1
R/W
16’h3084
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