LAN9420I-NU Standard Microsystems (SMSC), LAN9420I-NU Datasheet - Page 59

• Manufacturer Part Number: LAN9420I-NU
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LAN9420I-NU

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface
Datasheet
SMSC LAN9420/LAN9420i
3.5.4.1
ENABLED
(Note
FILTER
BITS
15:0
Yes
Yes
Yes
Yes
3.2)
Table 3.19
of the
Note 3.2
Note 3.3
Note 3.4
Note 3.5
Note: x indicates “don’t care”.
Magic Packet Detection
Setting the Magic Packet Enable bit (MPEN) in the
Register (WUCSR)," on page
normal data reception is disabled, and detection logic within the MAC examines receive data for a
Magic Packet. The MAC can be programmed to assert the wake event interrupt to the Interrupt
Controller on detection. Upon detection, the Magic Packet Received bit (MPR) in the WUCSR is set.
When the Host clears the MPEN bit, normal receive operation will resume. Please refer to
4.4.12, "Wakeup Control and Status Register (WUCSR)," on page 133
register
In Magic Packet mode, logic within the MAC constantly monitors each frame addressed to the node
for a specific Magic Packet pattern. It checks only packets with the MAC’s address or a broadcast
address to meet the Magic Packet requirement. The MAC checks each received frame for the pattern
48’hFF_FF_FF_FF_FF_FF after the destination and source address field.
DESCRIPTION
Pattern CRC-16: This field contains the 16-bit CRC value from the pattern and the byte mask
programmed to the wakeup filter register function. This value is compared against the CRC
calculated on the incoming frame, and a match indicates the reception of a wakeup frame.
(Note
MATCH
CRC
Yes
Yes
Yes
Yes
Wakeup Control and Status Register (WUCSR)
3.3)
indicates the cases that produce a wake when the
As determined by bit 0 of Filter i Command.
CRC matches Filter i CRC-16 field.
As determined by bit 9 of WUCSR.
As determined by bit 2 of Filter i Command.
ENABLED
UNICAST
(Note
GLOBAL
Yes
x
x
x
Table 3.18 Filter i CRC-16 Bit Definitions
3.4)
Table 3.19 Wakeup Generation Cases
FILTER i CRC-16 DESCRIPTION
133, places the MAC in the “Magic Packet” detection mode. In this mode,
REGULAR
RECEIVE
FILTER
PASS
Yes
Yes
DATASHEET
x
x
59
ADDRESS
(Note
Multicast
Unicast
TYPE
(=1)
(=0)
x
x
3.5)
is set. All other cases do not generate a wake.
Section 4.4.12, "Wakeup Control and Status
BROAD-
FRAME
Wakeup Frame Enable (WAKE_EN)
CAST
Yes
No
No
No
for additional information on this
FRAME
MULTI-
CAST
Yes
No
No
No
Revision 1.4 (12-17-08)
UNICAST
FRAME
Yes
Yes
No
No
Section
bit