DS33X81+ Maxim Integrated Products, DS33X81+ Datasheet - Page 85

• Manufacturer Part Number: DS33X81+
• Description: IC MAPPING ETHERNET 256CSBGA
• Manufacturer: Maxim Integrated Products

Specifications of DS33X81+

• Applications: Data Transport
• Interface: Parallel/Serial
• Voltage - Supply: 1.8V, 2.5V, 3.3V
• Package / Case: 256-CSBGA
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.19.3 Programmable Ethernet Destination Address Filtering
In addition to the automatic learning and filtering features described in Section 8.18, the Ethernet MAC has the
capability to filter frames by MAC Destination Address. This feature is available at all data rates. The user may
program up to 16 destination addresses that may be allowed or disallowed.
The following pseudo code is an example enabling static MAC address filter 0 to allow frames with a DA of
12:34:56:78:9A:BC to pass.
Perform an indirect write to MACCR for a basic configuration:
Configure MAC Filter #0 to a value of
Configure the MAC Filtering in MACFCR:
Rev: 063008
________________________________________________ DS33X162/X161/X82/X81/X42/X41/X11/W41/W11
0x004A = 0x00 ; Point to MACCR
0x004B = 0x00
0x0046 = 0x0C
0x0047 = 0x88
0x0048 = 0x00
0x0049 = 0x00
0x004C = 0x01 ; issue write command
0x004A = 0x40 ; Point to ADDR0H
0x004B = 0x00
0x0046 = 0x9A ; Note the byte order of 9A:BC.
0x0047 = 0xBC
0x0048 = 0x00
0x0049 = 0x80
0x004C = 0x01 ; issue write command
0x004A = 0x44 ; Point to ADDR0L
0x004B = 0x00
0x0046 = 0x12 ; Note the byte order of 12:34:56:78
0x0047 = 0x34
0x0048 = 0x56
0x0049 = 0x78
0x004C = 0x01 ; issue write command
0x004A = 0x04 ; Point to MACFCR
0x004B = 0x00
0x0046 = 0x00 ; 0x01 will disable filtering
0x0047 = 0x00
0x0048 = 0x00
0x0049 = 0x00 ; 0x80 will disable filtering
0x004C = 0x01 ; issue write command
12:34:56:78:9A:BC and enable it:
85 of 375