參數(shù)資料
型號(hào)： RTL8309SB
廠商： Electronic Theatre Controls, Inc.
英文描述： SINGLE-CHIP 9-PORT 10/100MBPS SWITCH CONTROLLER
中文描述： 單芯片9口10/100Mbps開關(guān)控制器
文件頁數(shù)： 86/115頁
文件大?。?/td> 866K
代理商： RTL8309SB
RTL8309SB
Datasheet
Single-chip 9-port 10/100Mbps Switch Controller
71
Track ID: JATR-1076-21 Rev. 1.4
If the MII port connects with an external MAC, such as the processor of a router application, it will act as a PHY. This is PHY
mode MII, or PHY mode SNI. In PHY mode MII or PHY mode SNI, the MII port uses the MAC part only, and provides an
external MAC interface to connect MACs of external devices. In order to connect both MACs, the MII of the switch MAC
should be reversed into PHY mode.
If the MII port connects with an external PHY, such as the PHY of a HomePNA application, it will act as a MAC. This is
MAC mode MII. In MAC mode MII, the MII port uses its MAC to connect to an external PHY and ignores the internal PHY
part.
The following figures illustrate various utilizations of the ninth port by setting strapping pins. They consist of the following
general system applications:
General standalone 8-port switch applications.
Router applications.
Router Application
HomePNA applications.
Other PHY applications.
13
/
MAC
Router
MAC
ADSL or Cable
Modem
(MII Interface PHY)
13
/
/
RTL8309SB
HomePNA or
Other PHYs
13
HomePNA or Other PHY Application
8 LAN
Ports
8 LAN
Ports
PHYceiver
PHYceiver
PHYceiver
PHYceiver
RTL8309SB
RX+-[0]
TX+-[0]
RX+-[0]
TX+-[0]
RX+-[1]
TX+-[1]
RX+-[1]
TX+-[1]
RX+-[7]
TX+-[7]
RX+-[7]
TX+-[7]
PHYceiver
PHYceiver
10/100
10/100
10/100
10/100
MAC 8
MAC 8
MAC 1
MAC 1
Mode
Select
Interface
MAC
Mode
PHY
Mode
Mode
Select
Interface
MAC
Mode
PHY
Mode
1 WAN
Interface
1 WAN
Interface
S
S
Figure 3. MII Port Application
MII Interface
In order to act as a PHY when the MII port is in PHY mode, some pins of the external MAC interface must be changed. For
example, TXC are input pins for MAC but output pins for PHY; so the pin MTXC/PRXC is input for MAC mode and output
for PHY mode. Refer to Figure 4, on page 72 to check the relationship between the RTL8309SB and the external device.
Note: Connect the input of the RTL8309SB to the output of the external device. The RTL8309SB has no RXER, TXER, and CRS
pins for MII signaling. Because the RTL8309SB does not support pin CRS, it is necessary to connect the MTXEN/PRXDV
(output) of PHY mode to both CRS and RXDV (input) of the external device.
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