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TNETX3150 数据表(PDF) 48 Page - Texas Instruments |
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TNETX3150 数据表(HTML) 48 Page - Texas Instruments |
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48 / 113 page  TNETX3150/TNETX3150A ThunderSWITCH™ 15-PORT 10-/100-MBIT/S ETHERNET™ SWITCH SPWS027F – FEBRUARY 1997 – REVISED SEPTEMBER 1997 48 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 port VLAN registers at 0x2*N + 0x00A4 through 0x2*N + 0x00A5 (N = port number in hex) The VLAN registers hold broadcast destination masks for each source port when IOB is in operation. Each bit in the VLAN register (with exception of bit 15) directly corresponds to a port (bit 14 = port 14 through bit 00 = port 00). Broadcast and multicast frames are directed according to the VLAN register setting for the port on which the broadcast or multicast frame was received. Each VLAN register is initialized at reset to send frames to all other ports except itself. After reset, the registers contain the following initial values (see Table 9). Table 9. VLAN Register Initial Values REGISTER NAME INITIAL VALUE DIO ADDRESS REGISTER NAME +1 +0 DIO ADDRESS VLAN 0 MASK 01111111 11111110 0x00A4 VLAN 1 MASK 01111111 11111101 0x00A6 VLAN 2 MASK 01111111 11111011 0x00A8 VLAN 3 MASK 01111111 11110111 0x00AA VLAN 4 MASK 01111111 11101111 0x00AC VLAN 5 MASK 01111111 11011111 0x00AE VLAN 6 MASK 01111111 10111111 0x00B0 VLAN 7 MASK 01111111 01111111 0x00B2 VLAN 8 MASK 01111110 11111111 0x00B4 VLAN 9 MASK 01111101 11111111 0x00B6 VLAN 10 MASK 01111011 11111111 0x00B8 VLAN 11 MASK 01110111 11111111 0x00BA VLAN 12 MASK 01101111 11111111 0x00BC VLAN 13 MASK 01011111 11111111 0x00BE VLAN 14 MASK 00111111 11111111 0x00C0 When EAM bit-map direction is in use, the VLAN registers are used to store the bit mask from the EAM. VLAN registers can be loaded only before the DRAM initialization (before the START bit is set). |
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