lan9217 Standard Microsystems Corp., lan9217 Datasheet - Page 17
lan9217
Manufacturer Part Number
lan9217
Description
Lan9217 16-bit High-performance Single-chip 10/100 Ethernet Controller With Hp Auto-mdix Support
Manufacturer
Standard Microsystems Corp.
Datasheet
1.LAN9217.pdf
(138 pages)
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16-bit High-Performance Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX Support
Datasheet
SMSC LAN9217
Crystal 1, Clock In
Auto-MDIX Enable
Wakeup Indicator
10/100 Selector
No Connect
Crystal 2
NAME
Reset
XTAL1/CLKIN
SPEED_SEL
AMDIX_EN
SYMBOL
nRESET
XTAL2
PME
NC
Table 2.5 System and Power Signals
BUFFER
O8/OD8
OCLK
TYPE
lCLK
(PU)
(PD)
(PU)
IS
I
I
DATASHEET
17
NUM
PINS
1
1
1
1
1
1
4
External 25MHz Crystal Input. This pin can also
be connected to single-ended TTL oscillator
(CLKIN). If this method is implemented, XTAL2
should be left unconnected.
External 25MHz Crystal output.
Active-low reset input. Resets all logic and
registers within the LAN9217. This signal is
pulled high with a weak internal pull-up resistor.
If nRESET is left unconnected, the LAN9217
will rely on its internal power-on reset circuitry.
Note:
When programmed to do so, is asserted when
the LAN9217 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:
Enables Auto-MDIX. Pull high enable Auto-
MDIX, pull low or leave unconnected to disable
Auto-MDIX.
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
Ethernet
No Connect. These pins must be left open.
The LAN9217 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
Description," on page 41
information
Detection of a Power Management
Event, and assertion of the PME
signal will not wakeup the LAN9217.
The LAN9217 will only wake up when
it detects a host write cycle (assertion
of nCS and nWR). Although any write
to the LAN9217, 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.
Settings", below.
Section 3.10, "Detailed Reset
DESCRIPTION
Table 2.2, "Default
Revision 2.3 (08-06-08)
for additional
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