LAN9116 Datasheet, PDF (11/109 Pages) SMSC Corporation – Highly Efficient Single-Chip 10/100 Non-PCI Ethernet Controller

LAN9116
TABLE 2-5:
Pin No.
95
SYSTEM AND POWER SIGNALS (CONTINUED)
Name
Symbol
Buffer
Type
# Pins
Reset
nRESET
IS
1
(PU)
70
Wakeup Indicator
PME
O8/OD8
1
71,73,7
Reserved
Reserved
5
5,84,90,
91
74
10/100 Selector
SPEED_SEL
I (PU)
1
Description
Active-low reset input. Resets all logic
and registers within the LAN9116 This
signal is pulled high with a weak
internal pull-up resistor. If nRESET is
left unconnected, the LAN9116 will rely
on its internal power-on reset circuitry
Note:
The LAN9116 must always
be read at least once after
power-up, reset, or upon
return from a power-saving
state or write operations will
not function. See Section
3.11, "Detailed Reset
Description," on page 31 for
additional information
When programmed to do so, is
asserted when the LAN9116 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:
Detection of a Power Man-
agement Event, and asser-
tion of the PME signal will
not wakeup the LAN9116.
The LAN9116 will only wake
up when it detects a host
write cycle (assertion of
nCS and nWR). Although
any write to the LAN9116,
regardless of the data writ-
ten, 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.
No Connect
This signal functions as a configuration
input on power-up and is used to select
the default Ethernet settings. Upon
deassertion of reset, the value of the
input is latched. This signal functions
as shown in Table 2-2, "Default
Ethernet Settings", below.
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DS00002268A-page 11