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TNETX3100 数据表(PDF) 22 Page - Texas Instruments |
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TNETX3100 数据表(HTML) 22 Page - Texas Instruments |
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22 / 80 page ![]() TNETX3100 ThunderSWITCH™ 10-PORT 10-/100-MBIT/S ETHERNET™ SWITCH SPWS031D – JUNE 1997 – REVISED OCTOBER 1997 22 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 DRAM and EAM interfaces (continued) Table 2. EAM Port Codes TNETX3100 EAM15 EAM09 EAM05 EAM04 EAM03 EAM00 PORT MODE SELECT EAM09–EAM05 EAM04 EAM03–EAM00 Port 00 (10/100 Mbit/s) 1 xxxxx 0 0000 Port 01 (10/100 Mbit/s) 1 xxxxx 0 0001 Port 02 (10 Mbit/s) 1 xxxxx 0 0010 Port 03 (10 Mbit/s) 1 xxxxx 0 0011 Port 04 (10 Mbit/s) 1 xxxxx 0 0100 Port 05 (10 Mbit/s) 1 xxxxx 0 0101 Port 06 (10 Mbit/s) 1 xxxxx 0 0110 Port 07 (10 Mbit/s) 1 xxxxx 0 0111 Port 08 (10 Mbit/s) 1 xxxxx 0 1000 Port 09 (10 Mbit/s) 1 xxxxx 0 1001 Reserved 1 xxxxx 0 1010 Reserved 1 xxxxx 0 1011 Reserved 1 xxxxx 0 1100 Reserved 1 xxxxx 0 1101 Reserved 1 xxxxx 0 1110 Broadcast channel 1 xxxxx 0 1111 No operation 1 xxxxx 1 xxxx Frame discard 0 00000 0 0000 Bit-map mode 0 EAM9–EAM0 = port destination bit-map unmatched frames When TNETX3100 receives a frame and the destination address is not matched by the address-compare unit, then it is processed in a manner that is dependent on the operating mode of the TNETX3100. This processing is defined in Table 3. Table 3. Unmatched Frame Processing EAM CODE LIMLRN PORT 00 BRUN RECEIVE PORT† EAM CODE LIMLRN NLEARN BRUN 00 01 02 03 04 05 06 07 08 09 Other X X X Per EAM code No operation 0 X 0 D 0 0 0 0 0 0 0 0 0 No operation 0 X 1 V V V V V V V V V V No operation 1 0 0 D D D D D D D D D D No operation 1 0 1 V V V V V V V V V V No operation 1 1 0 D 0 0 0 0 0 0 0 0 0 No operation 1 1 1 D V V V V V V V V V † 0 = Transmit on port 00 D = Discard V = Transmit using VLAN register of receiving port |
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