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TNETX4080GGP 数据表(PDF) 13 Page - Texas Instruments |
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TNETX4080GGP 数据表(HTML) 13 Page - Texas Instruments |
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13 / 64 page  TNETX4080 ThunderSWITCH II™ 8-PORT 10-/100-MBIT/S ETHERNET™ SWITCH SPWS050A – AUGUST 1998 – REVISED NOVEMBER 1998 13 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 DIO interface description The DIO is a general-purpose interface that is used with a range of microprocessor or computer system interfaces. The interface is backward compatible with the existing TI ThunderSWITCH ™ products. The DIO provides new signals to support external DMA controllers for improved performance. This interface configures the switch using the attached CPU, and to access statistics registers (see Table 2). DIO accesses the NM port to allow frame data to be transferred between the CPU and the switch to support spanning tree, SNMP, and RMON. The CPU reads and writes packets directly under software control or an external DMA controller can be used to improve performance. See TNETX4090 Programmer’s Reference Guide, literature number SPAU003, for description of registers. Table 2. DIO Internal Register Address Map BYTE 3 BYTE 2 BYTE 1 BYTE 0 DIO ADDRESS Port1Control Port0Control 0x0000 Port3Control Port2Control 0x0004 Port5Control Port4Control 0x0008 Port7Control Port6Control 0x000C Reserved Reserved 0x0010 Reserved 0x0014–0x003C Reserved UnkVLANPort MirrorPort UplinkPort 0x0040 Reserved AgingThreshold 0x0044 Reserved 0x0048–0x004C NLearnPorts 0x0050 TxBlockPorts 0x0054 RxUniBlockPorts 0x0058 RxMultiBlockPorts 0x005C UnkUniPorts 0x0060 UnkMultiPorts 0x0064 UnkSrcPorts 0x0068 NewVLANIntPorts 0x006C Reserved 0x0070–0x007C TrunkMap3 TrunkMap2 TrunkMap1 TrunkMap0 0x0080 TrunkMap7 TrunkMap6 TrunkMap5 TrunkMap4 0x0084 Trunk3Ports Trunk2Ports Trunk1Ports Trunk0Ports 0x0088 Reserved Reserved 0x008C Reserved 0x0090–0x009C DevCode Reserved SIO Revision 0x00A0 DevNode[23:16] DevNode[31:24] DevNode[39:32] DevNode[47:40] 0x00A4 Reserved DevNode[7:0] DevNode[15:8] 0x00A8 MCastLimit 0x00DC RamStatus RamControl Reserved 0x00E0 Reserved 0x00E4 PauseTime100 PauseTime10 0x00E8 Reserved Reserved 0x00EC Reserved FlowThreshold 0x00F0 Reserved LEDControl 0x00F4 |
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