參數(shù)資料
型號: GT-48207
廠商: Galileo Technology Services, LLC
英文描述: Advanced Switched Ethernet Controllers for 10+10/100 BaseX(高級交換式 10+10/100 BaseX以太網(wǎng)控制器)
中文描述: 先進(jìn)的交換式以太網(wǎng)控制器的10 10/100 BaseX(高級交換式10 10/100 BaseX以太網(wǎng)控制器)
文件頁數(shù): 50/135頁
文件大?。?/td> 1619K
代理商: GT-48207
GT-482xx Switched Ethernet Controllers for 10+10/100 BaseX
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Revision 1.2
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MICROARCHITECTURAL OVERVIEW
The GT-482xx is comprised of the following hardware units:
CPU Interface
The CPU Interface Includes all interface functions to the CPU bus. It handles all interconnect
control signals and executes CPU slave transactions. The CPU interface unit controls the
packet transfer between the GT-482xx and the CPU. It includes simple registers for passing
messages to/from the CPU. The GT-482xx is always a slave on the CPU interface.
SDRAM Interface
Includes all the interface functions to 1 or 4Mbyte SGRAM or SDRAM. It generates the con-
trol signals and drives the address/data lines.
Switching Core
Performs the switching functions between the 12 or 8 10Mbit ports and the two 100Mbit ports
and the CPU.
10Mbit Port Unit
There are three 10Mbit port units in the GT-48212 (two in the GT-48207 and GT-48208).
Each handles four 10Mbit ports and consists of DMA, four 64x32-bit word FIFOs (one for
each port), counters and serial interface blocks. Packets are transferred between the DRAM
interface and the Ethernet 10Mbit serial interface. It uses the GT-482xx RXM,TXM and SIA
with the addition of the MAC-CONTROL block that performs IGMP trapping and flow control.
100Mbit Port Unit
There is one such unit. Each handles two 100Mbit ports and consists of DMA, two 128x32-bit
FIFOs, counters and serial blocks. Packets are transferred between the DRAM interface and
the Ethernet 10Mbit serial interfaces. It uses the GT-482xx RXM, TXM and MII with the addi-
tion of the MAC-CONTROL block that performs IGMP trapping and flow control.
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