LAN91C111 Datasheet, PDF (14/125 Pages) SMSC Corporation – 10/100 Non-PCI Ethernet Single Chip MAC + PHY

LAN91C111
Pin No.
TQFP
113-116
QFP
115-118
109
111
118
120
121-124
25
123-126
27
Name
Symbol
Buffer
Type
Description
Transmit Data TXD3-
TXD0
Transmit Clock TX25
Receive Clock RX25
Receive Data
Management
Data Input
RXD3-
RXD0
MDI
O12
Outputs. Transmit Data nibble to MII PHY.
I with
pullup
I with
pullup
I with
pullup
I with
pulldown
Input. Transmit clock input from MII.
Nibble rate clock (25MHz for 100Mbps &
2.5MHz for 10Mbps).
Input. Receive clock input from MII PHY.
Nibble rate clock. (25MHz for 100Mbps &
2.5MHz for 10Mbps).
Inputs. Received Data nibble from MII
PHY.
MII management data input.
26
28
Management MDO
O4
MII management data output.
Data Output
27
29
Management MCLK
O4
MII management clock.
Clock
126
128
Receive Error RX_ER
I with
Input. Indicates a code error detected by
pulldown PHY. Used by the LAN91C111 to discard
the packet being received. The error
indication reported for this event is the
same as a bad CRC (Receive Status
Word bit 13).
2
4
nChip Select nCSOUT O4
Output. Chip Select provided for mapping
Output
of PHY functions into LAN91C111
decoded space. Active on accesses to
LAN91C111’s eight lower addresses
when the BANK SELECTED is 7.
12
14
External
RBIAS
NA
Transmit Current Set. An external resistor
Resistor
connected between this pin and GND will
set the output current for the TP transmit
outputs
14
16
TPO+
O/I
Twisted Pair Transmit Output, Positive.
15
17
TPO-
O/I
Twisted Pair Transmit Output, Negative
17
19
TPI+
I/O
Twisted Pair Receive Input, Positive
18
20
TPI-
I/O
Twisted Pair Receive Input, Negative.
22
24
nLEDA
OD24
PHY LED Output
23
25
nLEDB
OD24
PHY LED Output
Note 5-1 If the EEPROM is enabled.
DS00002276A-page 14
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