KSZ8842-16 Datasheet, PDF (65/126 Pages) Micrel Semiconductor – 2-Port Ethernet Switch with Non-PCI Interface

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KSZ8842-16/32 MQL/MVL
Bank 19 Multicast Table Register 0 (0x00): MTR0
The 64-bit multicast table is used for group address filtering. This value is defined as the six most significant bits from
CRC circuit calculation result that is based on 48-bit of DA input. The two most significant bits select one of the four
registers to be used, while the others determine which bit within the register.
Multicast table register 0.
Bit
Default Value R/W Description
15-0
0x0000
RW MTR0 Multicast Table 0
When the appropriate bit is set, if the packet received with DA matches the CRC, the
hashing function is received without being filtered.
When the appropriate bit is cleared, the packet will drop.
Note: When the receive all (RXRA) or receive multicast (RXRM) bit is set in the RXCR,
all multicast addresses are received regardless of the multicast table value.
Bank 19 Multicast Table Register 1 (0x02): MTR1
Multicast table register 1.
Bit
Default Value R/W Description
15-0
0x0000
RW MTR0 Multicast Table 1
When the appropriate bit is set, if the packet received with DA matches the CRC, the
hashing function is received without being filtered.
When the appropriate bit is cleared, the packet will drop.
Note: When the receive all (RXRA) or receive multicast (RXRM) bit is set in the RXCR,
all multicast addresses are received regardless of the multicast table value.
Bank 19 Multicast Table Register 2 (0x04): MTR2
Multicast table register 2.
Bit
Default Value R/W Description
15-0
0x0000
RW MTR0 Multicast Table 2
When the appropriate bit is set, if the packet received with DA matches the CRC, the
hashing function is received without being filtered.
When the appropriate bit is cleared, the packet will drop.
Note: When the receive all (RXRA) or receive multicast (RXRM) bit is set in the RXCR,
all multicast addresses are received regardless of the multicast table value.
Bank 19 Multicast Table Register 3 (0x06): MTR3
Multicast table register 3.
Bit
Default Value R/W Description
15-0
0x0000
RW MTR0 Multicast Table 3
When the appropriate bit is set, if the packet received with DA matches the CRC, the
hashing function is received without being filtered.
When the appropriate bit is cleared, the packet will drop.
Note: When the receive all (RXRA) or receive multicast (RXRM) bit is set in the RXCR,
all multicast addresses are received regardless of the multicast table value.
Banks 20 – 31: Reserved
Except Bank Select Register (0xE).
November 2005
65
Rev. 1.4