AX88615 ASIX [ASIX Electronics Corporation], AX88615 Datasheet - Page 26

• Manufacturer Part Number: AX88615
• Description: 5-Port 10/100BASE Ethernet Switch
• Manufacturer: ASIX [ASIX Electronics Corporation]

Appendix B: Design Note
B.1 Using Station Management (STA) Connection
There are two methods to get per port speed and duplex information in AX88615 . One way is by hardware pins such as
SPEED0, SDUPLEX0, SPEED1, SDUPLEX1. Ax88615 also provides 2 pins (MDC and MDIO, STA – Station
Management connection) to read PHY Auto Negotiation Remote Capability register to get current speed and duplex
status. When use STA function, the connected PHY address settings must be fixed as follows:
The corresponding option setting
/RdPhy_En = 0
B.2 Using MII I/F connects to MAC
Using MII interface to connect to MAC type device
Port 0
0fh
Note : 1. The MAC needs to run at fullduplex mode.
AX88615 / Switch
AX88615P 5-Port 10/100Mb Switch Controller PRELIMINARY
2. Care must be taken that the receive side has enough setup and/or hold time
3. Some kind of CPU with embbeded MAC can also refer to this example
Port 1
10h
10K * 2
SDUPLEX0
SCOL_SP0
STXEN0
STXCLK0
STXD0[3:0]
SCRS0
SRXDV0
SRXCLK0
SRXD0[3:0]
3.3V
Port 2
11h
Gnd
application for AX88615 is illustrated bellow.
Port 3
12h
26
10K
Port 4
ASIX ELECTRONICS CORPORATION
13h
25MHz
Clock
COL
CRS
RX_DV
RX_CLK
RXD[3:0]
RX_ER
TX_EN
TX_CLK
TXD[3:0]
TX_ER
AX88195 / MAC
CONFIDENTIAL