KSZ9567R datasheet(47/233 Pages) MICROCHIP

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DS00002329E-page 47

KSZ9567R

• When 0, the unit is microsecond.

• When 1, the unit is millisecond.

The CA bit (located in the Action rule) determines the algorithm used to generate an interrupt when the count terminates.

• When 0, an 11-bit counter will be loaded with the count value from the list and start counting down every unit time.

An interrupt will be generated when the timer expires, i.e. the next qualified packet has not been received within

the period specified by the value.

• When 1, the counter is incremented with every matched packet received. An interrupt is generated when the ter-

minal count is reached. The count resets thereafter. Time units are not used in this mode.

TABLE 4-18:

ACL MATCHING RULE PARAMETERS FOR MD = 10

Parameter

Description

MD[1:0]

MODE

00 = Matching rule is disabled

01 = Layer 2 MAC header or counter filtering

10 = Layer 3 IP header filtering

11 = Layer 4 TCP header (and IP protocol) filtering

ENB[1:0]

00 = Reserved

01 = IPv4 source or destination address (with mask)

10 = IPv4 source and destination address (without mask)

11 = Reserved

S/D

Source / Destination

0 = Destination address

1 = Source address

Equal / Not Equal

0 = Not Equal produces true result

1 = Equal produces true result

IP ADDRESS[31:0]

IPv4 address

Source or destination address (determined by S/D) when ENB = 01,

Source address when ENB = 10

IP MASK[31:0]

Mask bits for the IPv4 address when ENB = 01:

0 = This bit of the address is compared

1 = This bit of the address is not compared

Destination IPv4 address when ENB = 10

TABLE 4-19:

ACL MATCHING RULE PARAMETERS FOR MD = 11

Parameter

Description

MD[1:0]

MODE

00 = Matching rule is disabled

01 = Layer 2 MAC header or counter filtering

10 = Layer 3 IP header filtering

11 = Layer 4 TCP header (and IP protocol) filtering

ENB[1:0]

00 = IP Protocol comparison is enabled

01 = TCP source/destination port comparison is enabled

10 = UDP source/destination port comparison is enabled

11 = TCP sequence number is compared

S/D

Source / Destination

0 = Destination address

1 = Source address

Equal / Not Equal

0 = Not Equal produces true result

1 = Equal produces true result

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