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參數(shù)資料
| 型號： | IDT82V2082BFG |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數(shù)： | 14/88頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC LIU T1/E1/J1 2CH 81BGA |
| 標準包裝： | 360 |
| 類型： | 線路接口裝置（LIU） |
| 規(guī)程： | T1，E1，J1 |
| 電源電壓： | 3.13 V ~ 3.47 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 81-LFBGA |
| 供應(yīng)商設(shè)備封裝： | 81-CABGA（8x8） |
| 包裝： | 托盤 |
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IDT82V2082
DUAL CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT
FUNCTIONAL DESCRIPTION
21
May 4, 2009
3.3.3.3 User-Programmable Arbitrary Waveform
When the PULS[3:0] bits are set to ‘11xx’, user-programmable arbitrary
waveform generator mode can be used in the corresponding channel. This
allows the transmitter performance to be tuned for a wide variety of line con-
dition or special application.
Each pulse shape can extend up to 4 UIs (Unit Interval), addressed by
UI[1:0] bits (TCF3, 07H...) and each UI is divided into 16 sub-phases,
addressed by the SAMP[3:0] bits (TCF3, 07H...). The pulse amplitude of
each phase is represented by a binary byte, within the range from +63 to -
63, stored in WDAT[6:0] bits (TCF4, 08H...) in signed magnitude form. The
most positive number +63 (D) represents the maximum positive amplitude
of the transmit pulse while the mostnegative number -63 (D) represents the
maximum negative amplitude of the transmit pulse. Therefore, up to 64
bytes are used. For each channel, a 64 bytes RAM is available.
There are twelvestandardtemplates which arestored inan on-chipROM.
User can select one of them as reference and make some changes to get
the desired waveform.
User can change the wave shape and the amplitude to get the desired
pulse shape. In order to do this, firstly, users can choose a set of waveform
value from the following twelve tables, which is the most similar to the
desired pulse shape. Table-2, Table-3, Table-4, Table-5, Table-6, Table-7,
data and scaling data of each of the twelve templates. Then modify the cor-
responding sample data to get the desired transmit pulse shape.
Secondly, through the value of SCAL[5:0] bits increased or decreased
by 1, the pulse amplitude can be scaled up or down at the percentage ratio
against the standard pulse amplitude if needed. For different pulse shapes,
the value of SCAL[5:0] bits and the scaling percentage ratio are different.
The following twelve tables list these values.
Do the followings step by step, the desired waveform can be pro-
grammed, based on the selected waveform template:
(1).Select the UI by UI[1:0] bits (TCF3, 07H...)
(2).Specify the sample address in the selected UI by SAMP [3:0] bits
(TCF3, 07H...)
(3).Write sample data to WDAT[6:0] bits (TCF4, 08H...). It contains the
data to be stored in the RAM, addressed by the selected UI and the
corresponding sample address.
(4).SettheRWbit(TCF3,07H...)to‘0’toimplementwritingdatatoRAM,
or to ‘1’ to implement read data from RAM
(5).Implement the Read from RAM/Write to RAM by setting the DONE
bit (TCF3, 07H...)
Repeat the above steps until all the sample data are written to or read
from the internal RAM.
(6).Write the scaling data to SCAL[5:0] bits (TCF2, 06H...) to scale the
amplitude of the waveform based on the selected standard pulse
amplitude
WhenmorethanoneUIisusedtocomposethepulsetemplate,theover-
lap of two consecutive pulses could make the pulse amplitude overflow
(exceed the maximum limitation) if the pulse amplitude is not set properly.
This overflow is captured by DAC_OV_IS bit (INTS1, 19H...), and, if
enabled by the DAC_OV_IM bit (INTM1, 14H...), an interrupt will be gen-
erated.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IDT82V2082BFG8 | 制造商:Integrated Device Technology Inc 功能描述:IC LIU T1/E1/J1 2CH 81BGA |
| IDT82V2082BFGBLANK | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:DUAL CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT |
| IDT82V2082PF | 功能描述:IC LIU T1/J1/E1 2CH 80-TQFP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 標準包裝:250 系列:- 類型:收發(fā)器 驅(qū)動器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| IDT82V2082PF8 | 功能描述:IC LIU T1/J1/E1 2CH 80-TQFP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 標準包裝:250 系列:- 類型:收發(fā)器 驅(qū)動器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| IDT82V2082PFBLANK | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:DUAL CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT |
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