LAN91C111_11 Datasheet, PDF (17/133 Pages) SMSC Corporation – 10/100 Non-PCI Ethernet Single Chip MAC + PHY

10/100 Non-PCI Ethernet Single Chip MAC + PHY
Datasheet
PIN NO.
TQFP
QFP
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
9
11
EEPROM Clock EESK
O4
Output. 4 μsec clock used to shift data in
and out of the serial EEPROM.
10
12
EEPROM
EECS
O4
Output. Serial EEPROM chip select.
Select
Used for selection and command framing
of the serial EEPROM.
7
9
EEPROM Data EEDO
O4
Output. Connected to the DI input of the
Out
serial EEPROM.
8
10
EEPROM Data EEDI
I with
Input. Connected to the DO output of the
In
pulldown ** serial EEPROM.
3-5
5-7
I/O Base
IOS0-IOS2 I with
Input. External switches can be
pullup**
connected to these lines to select
between predefined EEPROM
configurations.
6
8
Enable
ENEEP
I with
Input. Enables (when high or open)
EEPROM
pullup**
LAN91C111 accesses to the serial
EEPROM. Must be grounded if no
EEPROM is connected to the
LAN91C111.
127, 128 1, 2
Crystal 1
Crystal 2
XTAL1
XTAL2
Iclk**
An external 25 MHz crystal is connected
across these pins. If a TTL clock is
supplied instead, it should be connected
to XTAL1 and XTAL2 should be left open.
XTAL1 is the 5V tolerant input of the
internal amplifier and XTAL2 is the output
of the internal amplifier.
1, 33, 44,
62, 77, 98,
110, 120
3, 35, 46,
64, 79,
100, 112,
122
Power
VDD
+3.3V Power supply pins.
11, 16
13, 18
Analog Power AVDD
+3.3V Analog power supply pins.
24, 39, 52,
57, 67, 72,
93, 103,
108, 117
26, 41, 54,
59, 69, 74,
95, 105,
110, 119
Ground
GND
Ground pins.
13, 19
15, 21
Analog Ground AGND
Analog Ground pins
21
23
Loopback
LBK
O4
Output. Active when LOOP bit is set
(TCR bit 1).
20
22
nLink Status
nLNK
I with
Input. General-purpose input port used to
pullup
convey LINK status (EPHSR bit 14).
28
30
nCNTRL
nCNTRL O12
General Purpose Control Pin
47
49
X25out
X25out
O12
25Mhz Output to external PHY
111
113
Transmit Enable TXEN100 O12
Output to MII PHY. Envelope to 100
100 Mbps
Mbps transmission.
119
121
Carrier Sense CRS100 I with
Input from MII PHY. Envelope of packet
100 Mbps
pulldown reception used for deferral and backoff
purposes.
SMSC LAN91C111 REV C
17
DATASHEET
Revision 1.92 (06-27-11)