LAN9218I-MT-E2 SMSC [SMSC Corporation], LAN9218I-MT-E2 Datasheet - Page 18

• Manufacturer Part Number: LAN9218I-MT-E2
• Description: High-Performance Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX & Industrial Temperature Support
• Manufacturer: SMSC [SMSC Corporation]

Revision 1.5 (07-18-06)
100,99
NO.
PIN
,98
70
Activity Indicator),
Wakeup Indicator
General Purpose
nLED1 (Speed
nLED2 (Link &
nLED3 (Full-
Indicator
Indicator),
I/O data,
Duplex
NAME
).
Table 2.5 System and Power Signals (continued)
GPIO[2:0]/
SYMBOL
LED[3:1]
PME
High-Performance Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX & Industrial Temperature Support
DATASHEET
BUFFER
O8/OD8
IS/O12/
TYPE
OD12
18
PINS
NUM
1
3
When programmed to do so, is
asserted when the LAN9218I detects
a wake event and is requesting the
system to wake up from the
associated sleep state. The polarity
and buffer type of this signal is
programmable.
Note:
General Purpose I/O data: These
three general-purpose signals are
fully programmable as either push-
pull output, open-drain output or input
by writing the GPIO_CFG
configuration register in the CSR’s.
They are also multiplexed as GP LED
connections.
GPIO signals are Schmitt-triggered
inputs. When configured as LED
outputs these signals are open-drain.
nLED1 (Speed Indicator). This
signal is driven low when the
operating speed is 100Mbs, during
auto-negotiation and when the cable
is disconnected. This signal is driven
high only during 10Mbs operation.
nLED2 (Link & Activity Indicator).
This signal is driven low (LED on)
when the LAN9218I detects a valid
link. This signal is pulsed high (LED
off) for 80mS whenever transmit or
receive activity is detected. This
signal is then driven low again for a
minimum of 80mS, after which time it
will repeat the process if TX or RX
activity is detected. Effectively, LED2
is activated solid for a link. When
transmit or receive activity is sensed
LED2 will flash as an activity
indicator.
nLED3 (Full-Duplex Indicator). This
signal is driven low when the link is
operating in full-duplex mode.
Detection of a Power
Management Event, and
assertion of the PME signal
will not wakeup the
LAN9218I. The LAN9218I
will only wake up when it
detects a host write cycle
(assertion of nCS and
nWR). Although any write to
the LAN9218I, regardless of
the data written, will wake-
up the device when it is in a
power-saving mode, it is
required that the
BYTE_TEST register be
used for this purpose.
DESCRIPTION
SMSC LAN9218I
Datasheet