K60P100M100SF2RM Datasheet, PDF (1198/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Functional Description
• The core FIFO receive/transmit functions are disabled
• The MAC receive logic is kept in normal mode, but it ignores all traffic from the line
except magic packets. They are detected so that a remote agent can wake the node.
44.4.7.2 Magic Packet Detection
The core is designed to detect magic packets (see Magic Packets) with the destination
address set to:
• Any multicast address
• The broadcast address
• The unicast address programmed in PADDR1/2
When a magic packet is detected, EIR[WAKEUP] is set and none of the statistic registers
are incremented.
44.4.7.3 Wake-up
When a magic packet is detected, indicated by ENETn_EIR[WAKEUP],
ENETn_ECR[SLEEP] should be cleared to resume normal operation of the MAC.
Clearing the SLEEP bit automatically masks ENETn_ECR[MAGICEN], disabling magic
packet detection.
44.4.8 IP Accelerator Functions
The following sections describe the IP accelerator functions.
44.4.8.1 Checksum Calculation
The IP and ICMP, TCP, UDP checksums are calculated with one's complement
arithmetic summing up 16-bit values.
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K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.