LAN83C185_03 Datasheet, PDF (14/65 Pages) SMSC Corporation – High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver

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