參數(shù)資料
型號(hào): IDT82V2604BBG
廠商: IDT, Integrated Device Technology Inc
文件頁(yè)數(shù): 9/97頁(yè)
文件大?。?/td> 0K
描述: IC INVERSE MUX 4CH ATM 208-BGA
標(biāo)準(zhǔn)包裝: 1
應(yīng)用: 無(wú)線
接口: Utopia
電源電壓: 2.97 V ~ 3.63 V
封裝/外殼: 208-BGA
供應(yīng)商設(shè)備封裝: 208-PBGA(17x17)
包裝: 托盤
安裝類型: 表面貼裝
其它名稱: 82V2604BBG
INTERFACE
17
December 4, 2006
IDT82V2604
Inverse Multiplexing for ATM
3INTERFACE
3.1
UTOPIA INTERFACE
The Utopia interface operates in Level 2 mode. The IDT82V2604
supports up to 4 Utopia Level 2 ports. Each port is assigned an address
ranging from 0 to 30. The address value of 31 is reserved and should
not be used. All the 31 ports can be individually enabled or disabled by
ConfigUtopiaIF command.
Each IMA group or UNI link corresponds to a port. For each IMA
group, the port address can be assigned by ConfigGroupInterface
command. For each UNI link, the port address can be assigned by
ConfigUNILink command. Inside the device, each port corresponds to
a GCF (Group Cell FIFO) which is 2 cells deep.
The IDT82V2604 uses cell level handshake for cell transfer. One
entire cell is transferred before another port can be selected. The start of
a cell is marked by TxSOC and RxSOC signals in the transmit and the
receive directions respectively. These two signals are active during the
first byte of a cell.
3.1.1
UTOPIA LOOPBACK FUNCTION
For diagnostic purpose, the capability to loop back all Utopia traffic to
Utopia bus is provided. This loopback is called Utopia loopback and can
be enabled by ConfigLoopMode command. In this mode, cells are
taken from TGCFs (Transmit Group Cell FIFO) and sent to the respec-
tive RGCFs (Receive Group Cell FIFO). When in Utopia loopback mode,
cells will not be transmitted to the line interface. Refer to Figure-3.
Figure-3 Utopia Loopback
UTOPIA Interface
Tx
Group
Cell
FIFO 1
Rx
Group
Cell
FIFO 1
Tx
Group
Cell
FIFO 0
Rx
Group
Cell
FIFO 0
……
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