High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 3.1 MII Signals (continued)
PIN NO.
37
TX_ER
(TXD4)
SIGNAL NAME
I
I
TYPE
DESCRIPTION
MII Transmit Error:
When driven high, the 4B/5B encode
process substitutes the Transmit Error code-group (/H/)
for the encoded data word. This input is ignored in
10BaseT operation.
In Symbol Interface (5B Decoding) mode, this signal
becomes the
MII Transmit Data 4:
the MSB of the 5-bit
symbol code-group.
48
33
30
29
38
34
CRS
RX_DV
RXD2
RXD3
TX_CLK
RX_CLK
O
O
O
O
O
O
Carrier Sense:
Indicate detection of carrier.
Receive Data Valid:
Indicates that recovered and
decoded data nibbles are being presented on RXD[3:0].
Receive Data 2:
Bit 2 of the 4 data bits that sent by the
PHY in the receive path.
Receive Data 3:
Bit 3 of the 4 data bits that sent by the
PHY in the receive path.
Transmit Clock:
25MHz in 100Base-TX mode. 2.5MHz in
10Base-T mode.
Receive Clock:
25MHz in 100Base-TX mode. 2.5MHz in
10Base-T mode.
Table 3.2 LED Signals
PIN NO.
16
SIGNAL NAME
SPEED100
TYPE
O
DESCRIPTION
LED1 –
SPEED100 indication. Active indicates that the
selected speed is 100Mbps. Inactive indicates that the
selected speed is 10Mbps.
LED2 –
LINK ON indication. Active indicates that the Link
(100Base-TX or 10Base-T) is on.
LED3 –
ACTIVITY indication. Active indicates that there
is Carrier sense (CRS) from the active PMD.
LED4 –
DUPLEX indication. Active indicates that the PHY
is in full-duplex mode.
17
19
20
LINKON
ACTIVITY
FDUPLEX
O
O
O
Table 3.3 Management Signals
PIN NO.
26
27
MDIO
MDC
SIGNAL NAME
TYPE
IO
I
DESCRIPTION
Management Data Input/OUTPUT:
Serial management
data input/output.
Management Clock:
Serial management clock.
Rev. 0.6 (12-12-03)
DATASHEET
6
SMSC LAN83C185
SMSC [ SMSC CORPORATION ]
