RTL8306SD/RTL8306SDM
Datasheet
Table 12. DUALMII/RMII Mode Configuration Table
Pin 42
Pin 44
Pin 45
Pin 96
Pin 99
Operating Mode
DIS
DUALMII
P4
MODE1
P4 MODE0
Default: 1
Modeset1
Default: 1 Default: 1
Modeset0
Default: 1
Default: 1
1
1
1
X
X
Port 4 is UTP or MAC4 in MAC Mode MI.
MII/RMII2 not used.
See Note 1.
1
1
1
0
0
1
X
X
X
X
Reserved.
MAC4 in PHY Mode MII
MII/RMII2 not used.
0
0
0
1
1
1
X
X
X
X
MAC4 in PHY Mode MII, and PHY4 in PHY
Mode MII.
See Note 2.
MAC4 in MAC Mode MII, and PHY4 in
PHY Mode MII.
See Note 2.
1
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
1
1
0
1
MAC4 in RMII.
MII/RMII 2 not used.
MAC4 in RMII, and PHY4 in RMII (UTP)
See Note 2.
MAC5 in PHY Mode MII, and MAC4 in
PHY Mode MII.
MAC5 in PHY Mode MII, and MAC4 in
RMII.
0
0
0
1
0
0
0
1
0
1
MAC5 in RMII, and MAC4 in RMII.
Port 4 UTP/MAC4 in MAC Mode MII, and
MAC5in MAC Mode MII.
See Note 3.
0
0
1
1
0
0
0
0
1
0
Port 4 UTP/MAC 4 MAC Mode MII; And
MAC 5 in PHY Mode MII.
See Note 3.
Port 4 UTP/MAC 4 MAC Mode MII And
MAC5 in RMII Mode.
See Note 3.
Note 1: When in this mode, if port 4 is connected with UTP, then the operating mode is Port 4UTP; If port 4 is not
connected with UTP and P4LINKSTA# tied to ground, then the operating mode is MAC 4 in MAC mode MII.
Note 2: When in these modes, PHY 4 MII is enabled and Pin 68 is used to select the operating mode of the port 4
differential pair: upon reset pin 68 is pulled-high and PHY 4 can be connected with UTP.
Note 3: When in this configuration, 3 modes can be further distinguished by the following rules:
1. If port 4 is connected with UTP, and Pin 68 is pulled-high (default: pulled-high) upon reset, then port 4 is a UTP port.
2. If MAC4 in MAC mode is needed, Pin P4LINKSTA# should be tied to ground and port 4 should not be connected with
UTP.
6-Port 10/100Mbps Single-Chip Dual MII/RMII Switch Controller
34
Track ID: JATR-1076-21 Rev. 1.1
REALTEK [ Realtek Semiconductor Corp. ]
