DM8203
2-port switch with MII / RMII Interface
5. Pin Description
I = Input, O = Output, I/O = Input / Output, O/D = Open Drain, P = Power, PD=internal pull-low (about 50K Ohm)
# = asserted Low
5.1 P2 MII / RMII / Reverse MII Interfaces
5.1.1 MII Interfaces
Pin No.
2
3
5,6,7,9
10
12
14
15
17
18
19
20
21,22,24,25
Pin Name
MDC
MDIO
TXD2_3~0
TXE2
TXC2
TXER2
CRS2
COL2
RXER2
RXC2
RXDV2
RXD2_3~0
I/O
O,PD
I/O
O,PD
O,PD
I/O
O,PD
I/O
I/O
I
I
I
I
Description
MII Serial Management Data Clock
MII Serial Management Data
Port 2 MII Transmit Data
4-bit nibble data outputs (synchronous to the TXC2)
Port 2 MII Transmit Enable
Port 2 MII Transmit Clock.
Port 2 MII Transmit Error
Port 2 MII Carrier Sense
Port 2 MII Collision Detect.
Port 2 MII Receive Error
Port 2 MII Receive Clock
Port 2 MII Receive Data Valid
Port 2 MII Receive Data
4-bit nibble data input (synchronous to RXC2)
5.1.2 RMII Interfaces
Pin No.
2
3
5,6
7,9
10
12
14
15
17
18
19
20
21,22
24,25
Pin Name
MDC
MDIO
TXD2_3~2
TXD2_1~0
TXE2
TXC2
TXER2
CRS2
COL2
RXER2
RXC2
RXDV2
RXD2_3~2
RXD2_1~0
I/O
O,PD
I/O
O,PD
O,PD
O,PD
O
O
I
I
I
I
I
I
I
Description
MII Serial Management Data Clock
MII Serial Management Data
Reserved
RMII Transmit Data
RMII Transmit Enable.
Reserved
Port 2 MII Transmit Error
RMII CRS_DV
Reserved, tie to ground in application.
Reserved, tie to ground in application.
50MHz reference clock.
Reserved, tie to ground in application.
Reserved, tie to ground in application.
RMII Receive Data.
Preliminary datasheet
DM8203-15-DS-P05
October 23, 2008
11
DAVICOM [ DAVICOM SEMICONDUCTOR, INC. ]
