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UM10503
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© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
859 of 1441
NXP Semiconductors
UM10503
Chapter 28: LPC43xx/LPC43Sxx Ethernet
28.7.1.2 Example for a multicast MAC address
MAC: 01-45-a2-6c-30-33
CRC32: 0x2CB41110
Last 2 bytes in binary: 0001 0000
Bit-wise reversal: 0000 1000
First 6 bits: 000010 ( 0=Hash Table Low / 00010 => 0x2 => bit 2 )
In the MAC_HASH_TABLE_LOW register, write a 1 to bit 2.
In the MAC_FRAME_FILTER register, set the HMC bit (bit 2) to 1.
28.7.2 Power management block
This section describes the power management (PMT) mechanisms supported by the
MAC. PMT supports the reception of network (remote) wake-up frames and Magic Packet
frames. PMT does not perform the clock gate function, but generates interrupts for
wake-up frames and Magic Packets received by the MAC. The PMT block sits on the
receiver path of the MAC and is enabled with remote wake-up frame enable and Magic
Packet enable. These enables are in the PMT Control and Status register and are
programmed by the Application.
When the power-down mode is enabled in the PMT, then all received frames are dropped
by the ethernet core and they are not forwarded to the application. The ethernet comes
out of the power-down mode only when either a Magic Packet or a Remote Wake-up
frame is received and the corresponding detection is enabled.
28.7.2.1 Remote wake-up frame registers
The register WKUPFMFILTER_REG, address (0x028), loads the Wake-up Frame Filter
register. To load values in a Wake-up Frame Filter register, the entire register
(WKUPFMFILTER_REG) must be written. The WKUPFMFILTER_REG register is loaded
by sequentially loading the eight register values in address (0x028) for
WKUPFMFILTER_REG0, WKUPFMFILTER_REG1,... WKUPFMFILTER_REG7,
respectively. WKUPFMFILTER_REG is read in the same way.
Remark:
The internal counter to access the appropriate WKUPFMFILTER_REG is
incremented when lane 3 (or lane 0 in big-endian) is accessed by the CPU. This should be
kept in mind if you are accessing these registers in byte or half-word mode.