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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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VSC7440 датащи(PDF) 69 Page - Microsemi Corporation |
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VSC7440 датащи(HTML) 69 Page - Microsemi Corporation |
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69 / 444 page  Functional Descriptions VMDS-10492 VSC7440 Datasheet Revision 4.2 52 Figure 18 • Frame Injection Formats For the long prefix, the incoming frame is matching against a programmable VLAN tag. The VLAN tag is common for all ports. Only the VID and TPID fields of the VLAN tag are compared. The following table lists the injection VLAN configuration register. When a port is setup to receive frames with either a short prefix or a long prefix, the incoming frames are checked against the selected prefix. If the prefix does not match, an error indication is set in ASM::PORT_STICKY.IFH_PREFIX_ERR_STICKY. Depending on the setting of ASM::PORT_CFG.INJ_DISCARD_CFG, the frames are processed in one of the three following modes. • None. Both compliant and non-compliant frames are forwarded. Compliant frames are forwarded based on the IFH, and non-compliant frames are forwarded as regular frames. • Drop non-compliant. Compliant frames are forwarded based on the IFH, and non-compliant frames are discarded. • Drop compliant. Compliant frame are discarded, and non-compliant frames are forwarded as normal frames. If a CPU port is used for frame injection, ASM::PORT_CFG.NO_PREAMBLE_ENA must be set to 1 so that the assembler does not expect frame data to be prepended with a preamble. If a front port is used for frame injection, ASM::PORT_CFG.SKIP_PREAMBLE_ENA must be set to 1 to discard the preamble data before processing of the prepended injection header. 3.11.3 Setting Up MAC Control Sublayer PAUSE Frame Detection The following table lists the PAUSE frame detection configuration registers in the assembler. Table 32 • Injection VLAN Register Overview Target::Register.Field Description Replication ASM::INJ_VLAN_CFG.INJ_VID_CFG Injection tag VID 1 ASM::INJ_VLAN_CFG.INJ_TPID_CFG Injection tag TPID 1 Table 33 • PAUSE Frame Detection Configuration Register Overview Target::Register.Field Description Replication ASM::PAUSE_CFG.ABORT_PAUSE_ENA Stop forwarding of PAUSE frames Per port ASM::PAUSE_CFG.ABORT_CTRL_ENA Stop forwarding of MAC control frames Per port ASM::MAC_ADDR_HIGH_CFG.MAC_ADDR_HIGH Bits 47-24 of DMAC address checked in MAC_Control frames Per port ASM::MAC_ADDR_LOW_CFG.MAC_ADDR_LOW Bits 23-0 of DMAC address checked in MAC_Control frames Per port Any DMAC 48 bits Any SMAC 48 bits Injection VLAN tag 32 bits IFH 224 bits Injection with long prefix: Injection with short prefix: Injection with no prefix: Original frame Original frame Start-of-frame 8880 16 bits 0009 16 bits Any DMAC 48 bits Any SMAC 48 bits IFH 224 bits Original frame 8880 16 bits 0009 16 bits IFH 224 bits |
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