參數(shù)資料
型號(hào)： IDT82V2608
廠商： Integrated Device Technology, Inc.
英文描述： INVERSE MULTIPLEXING FOR ATM
中文描述： 反向復(fù)用的ATM
文件頁(yè)數(shù)： 12/98頁(yè)
文件大?。?/td> 398K
代理商： IDT82V2608
PIN DESCRIPTION
12
December 4, 2006
IDT82V2608
Inverse Multiplexing for ATM
2
PIN DES CRIPT ION
Table-1 Pin Description
Name
Pin Number
Input/Output
Description
Global Signals
SYSCLK
E4
I
SYSCLK: System Clock
Systemclock for the IDT82V2608. Default is 20 MHz.
RST
R11
I
RST
: System Reset
Systemreset signal, low active. After reset, all registers are reset to default values, and both the con-
tents in SRAMand the downloaded software are cleared.
ATMUtopia Interface
TxClk
E14
I
TxClk: Utopia Transmit Clock
Utopia transmt clock used to transfer data fromthe ATMlayer to the IDT82V2608. The frequency of
the TxClk should be less than or equal to that of the systemclock.
Data is sampled on the rising edge of this signal.
TxEnb
G14
I
TxEnb
: Utopia Transmit Enable
Utopia low active signal asserted by the ATMlayer device during cycles when TxData contains valid
cell data.
The
TxEnb
input is sampled on the rising edge of TxClk.
TxAddr4
TxAddr3
TxAddr2
TxAddr1
TxAddr0
F15
F14
F13
E16
E15
I
TxAddr[4:0]: Utopia Transmit Address
Utopia transmt port address driven fromthe ATMlayer to poll and select an appropriate port.
The TxAddr[4:0] input bus are sampled on the rising edge of TxClk.
TxData7
TxData6
TxData5
TxData4
TxData3
TxData2
TxData1
TxData0
G15
G16
H14
H15
H16
J16
J15
J14
I
TxData[7:0]: Utopia Transmit Data
Utopia 8-bit data bus driven fromthe ATMlayer to the IDT82V2608.
The TxData[7:0] input bus are sampled on the rising edge of TxClk.
TxClav
E13
High-Z
O
TxClav: Utopia Transmit Cell Available
Utopia transmt cell available signal fromthe IDT82V2608 to the ATMlayer. A polled port drives TxClav
only during each cycle following one with its address on the TxAddr lines. The polled port asserts
TxClav high to indicate its corresponding FIFO can accept the transfer of a complete cell, otherwise it
deasserts the signal.
The TxClav output is updated on the rising edge of TxClk.
Note:
This pin requires a pull-down resistor.
TxSOC
F16
I
TxSOC: Utopia Transmit Start of Cell
Utopia start of cell signal. It will be driven high by the ATMlayer when TxData[7:0] contain the first valid
byte of a cell.
The TxSOC input is sampled on the rising edge of TxClk.
RxClk
D16
I
RxClk: Utopia Receive Clock
Utopia receive clock. The frequency of RxClk should be less than or equal to the frequency of the sys-
temclock.
Data is sampled on the rising edge of this signal.
RxEnb
D15
I
RxEnb
: Utopia Receive Enable
When this pin is low, the received data will be transferred on RxData[7:0] in the following cycles.
The
RxEnb
input is sampled on the rising edge of RxClk.
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