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AT79C1030 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - 8-Port Gigabit Ethernet CoS Switch - ATMEL Corporation

भाग संख्या AT79C1030
समारोह 8-Port Gigabit Ethernet CoS Switch
मैन्युफैक्चरर्स ATMEL Corporation 
लोगो ATMEL Corporation लोगो 
पूर्व दर्शन
1 Page
		
<?=AT79C1030?> डेटा पत्रक पीडीएफ

AT79C1030 pdf
also supports filtering special packets to prevent unnecessary flow, such as broadcast storms,
so broadcast/ARP packets can be discarded according to user settings.
Overview
Ethernet Packet
Reception and
Transmission
The AT79C1030 complies with the IEEE 802.3 MII/GMII specification. The switch supports
full/half duplex mode.
• In full-duplex mode, from the same port, the switch receives and transmits packets at the
same time; line flow control is performed by sending or resolving pause frames.
• In half-duplex mode, reception and transmission can't take place from the same port at the
same time. When a collision occurs, the packet should be retransmitted according to the
back-off algorithm. Line flow control is implemented by the back-pressure algorithm.
The switch works in 10/100/1000Mb/s in both full/half duplex modes. The full or half duplex
mode and data rate are selected via auto-negotiation or manually. In order to support auto-
negotiation the MDIO interface is implemented.
Receiving Operation
The device calculates the size of an ingress packet and decides whether the size of the packet
is legal. At the same time, a CRC check is performed to verify whether the input packet data is
right.
Transmitting Operation
The switch adds, removes, or changes the tag of the egress packet according to the related
settings. The device re-calculates the CRC of this packet again to ensure sending the right
packet in case the packet data is modified.
Figure 1. AT79C1030 Block Diagram
CPU
RS-232
VLAN
TABLE
MAC
TABLE
SWITCH
CORE
MEMORY
MANAGER
MEMORY
REGISTER
DMA
DMA
DMA
DMA
FIFO
MAC
FIFO
MAC
FIFO
MAC
FIFO
MAC
SMI
POR
T7
POR
T6
POR
T1
POR
T0
TX
RX TX
RX 8 GMII/MII TX
RX TX
RX
MDIO MDC
2 AT79C1030
3435BS–NETST–6/04

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डाउनलोड[ AT79C1030 Datasheet.PDF ]


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अनुशंसा डेटापत्रक

भाग संख्याविवरणविनिर्माण
AT79C10308-Port Gigabit Ethernet CoS SwitchATMEL Corporation
ATMEL Corporation


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