Datasheet

High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Revision 0.8 (06-12-08) 12 SMSC LAN83C185
DATASHEET
37 TX_ER
(TXD4)
I
I
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 CRS O Carrier Sense: Indicate detection of carrier.
33 RX_DV O Receive Data Valid: Indicates that recovered and
decoded data nibbles are being presented on RXD[3:0].
30 RXD2 O Receive Data 2: Bit 2 of the 4 data bits that sent by the
PHY in the receive path.
29 RXD3 O Receive Data 3: Bit 3 of the 4 data bits that sent by the
PHY in the receive path.
38 TX_CLK O Transmit Clock: 25MHz in 100Base-TX mode. 2.5MHz in
10Base-T mode.
34 RX_CLK O Receive Clock: 25MHz in 100Base-TX mode. 2.5MHz in
10Base-T mode.
Table 3.2 LED Signals
PIN NO. SIGNAL NAME TYPE DESCRIPTION
16 SPEED100 O LED1 – SPEED100 indication. Active indicates that the
selected speed is 100Mbps. Inactive indicates that the
selected speed is 10Mbps.
17 LINKON O LED2 – LINK ON indication. Active indicates that the Link
(100Base-TX or 10Base-T) is on.
19 ACTIVITY O LED3 – ACTIVITY indication. Active indicates that there
is Carrier sense (CRS) from the active PMD.
20 FDUPLEX O LED4 – DUPLEX indication. Active indicates that the PHY
is in full-duplex mode.
Table 3.3 Management Signals
PIN NO. SIGNAL NAME TYPE DESCRIPTION
26 MDIO IO Management Data Input/OUTPUT: Serial management
data input/output.
27 MDC I Management Clock: Serial management clock.
Table 3.1 MII Signals (continued)
PIN NO. SIGNAL NAME TYPE DESCRIPTION