LAN83C180_01 Datasheet, PDF (5/22 Pages) SMSC Corporation – 10/100 Fast Ethernet PHY Transceiver

PIN #
19
18
25
26
33
34
13
DESCRIPTION OF PIN FUNCTIONS
NAME
RXIN
RXIP
TXON
TXOP
TXREF10
TXREF100
nRESET
TYPE
DESCRIPTION
MD INTERFACE
Diff. Input Differential receive pair from magnetics (-)
Diff. Input Differential receive pair from magnetics (+)
Diff. Output 100 Differential transmit pair to magnetics (-)
Diff. Output 100 Differential transmit pair to magnetics (+)
Input 10BASE-T transmitter current setting pin
Input 100BASE-TX transmitter current setting pin
Input/
Output
Active low, power-on reset output and external reset
input.
41
XTAL1
40
XTAL2
46
MDC
45
MDIO
52
55,56,57,5
8
51
59
1
60,61,62,6
3
3
64
50
49
RX_CLK
RXD0,RXD1,RXD2,
RXD3
RX_DV
RX_ER
TX_CLK
TXD0,TXD1,TXD2,T
XD3
TX_EN
TX_ER
CRS
COL
43
22
48
21
31,30,29,1
6,12
4
REFCLK
ANEN
RXEN
RPTR
PA0,PA1,
PA2,PA3,PA4
FDST
6
SPDST
23
ICFG
7
ACTST/MINT
Input
25MHz crystal input. This signal should be pulled
high when using REFCLK.
Input
25MHz crystal input. This signal should be left
unconnected when using REFCLK.
MII INTERFACE
Input Management interface clock (up to 2.5MHz)
Input/ Management data
OUTPUT
Output Receive clock (2.5MHz for 10, 25MHz for 100)
Output Receive data MII interface
Output
Output
Output
Input
Receive data valid. Active high
Receive error. Active high. (RXD4 in symbol mode)
Transmit clock (2.5MHz for 10, 25MHz for 100)
Transmit Data MII interface
Input Transmit Enable. Active high
Input Transmit Error. Active high. (TXD4 in symbol mode)
Output Carrier sense signal. Active high
Output Collision signal. Active high
MISCELLANEOUS
Input
Reference clock. This signal should be pulled high
when using crystal.
Input Auto Negotiation enable. Active high
Input Receive enable. Active high
Input Repeater enable. Active high
Input PHY address
MISCELLANEOUS/LED
Input/ Full duplex LED status indication when nRESET
OUTPUT high. Active low. Input when nRESET is low. High
input means the LAN83C180 advertises full duplex
capability
Input Speed (10/100) LED status indication when
nRESET high. High for 100Mb/s mode. Input when
nRESET is low. Low input will cause the
LAN83C180 to advertise 100Mb/s capability.
Input Interrupt configuration. MINT on pin 8 when High,
on pin 7 when Low.
Output Receive/Transmit activity LED status indication
(Active Low) if ICFG = 1. If ICFG = 0, output is
MINT and activity is indicated on the LNKST output.
SMSC DS – LAN83C180
Page 5
Rev. 08/24/2001