- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄378075 > PSF21911 (SIEMENS A G) ISDN Echocancellation Circuit for Terminal Applications IEC-Q TE PDF資料下載
參數(shù)資料
| 型號： | PSF21911 |
| 廠商： | SIEMENS A G |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | ISDN Echocancellation Circuit for Terminal Applications IEC-Q TE |
| 中文描述： | DATACOM, ISDN ECHO CANCELLER |
| 文件頁數(shù)： | 83/164頁 |
| 文件大小： | 1401K |
| 代理商： | PSF21911 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁當(dāng)前第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁第146頁第147頁第148頁第149頁第150頁第151頁第152頁第153頁第154頁第155頁第156頁第157頁第158頁第159頁第160頁第161頁第162頁第163頁第164頁
PSB 21911
PSF 21911
Access to IOM-2 Channels
Semiconductor Group
83
11.97
of the FIFOs are parallely shifted to DRU and DRI respectively. DRU and DRI have to be
read before the next interrupt ISTA:D can occur, otherwise 8 bits will be lost. DWU and
DWI have to be loaded with data for 4 IOM-frames. Data in DWU and DWI is assumed
to be valid at the time ISTA:D occurs. The register contents are shifted parallely into two
2-bit FIFOs of length four, from where the data is put to IOM-2 and U respectively during
the following 4 IOM-frames. During this time, new data can be placed on DWU and DWI.
DWU and DWI are not cleared after the data was passed to the FIFOs. That is, a byte
may be put into DWU or DWI once and continously passed to IOM or U, respectively.
Figure
27
illustrates this procedure:
Figure 27 Procedure for the D-Channel Processing
Note:
Default of DWU, DWI, DRU and DRI after reset is "FF
H
".
2.6.3
C/I Channel Access
Setting SWST:CI to "1" enables the microprocessor to access C/I-commands and
indications between IOM-2 and the U-transceiver.
A change in two consecutive frames (double last look) in the C/I-channel on IOM-2 is
indicated by an interrupt ISTA:CICI. The received C/I-command can be read from
register CIRI. A change in the C/I-channel coming from the U-transceiver is indicated by
an interrupt ISTA:CICU. The new C/I-indication can be read from register CIRU .
Note: The term C/I-indication always refers to a C/I-code coming from the U-transceiver,
whereas the term C/I-command refers to a C/I-code going into the U-transceiver.
A C/I-code going to the U-transceiver has to be written into the CIWU-register. A C/I-
code to IOM-2 has to be written into the CIWI-register. The contents of both registers
(CIWU and CIWI) will be transferred at the next available IOM-2 frame. The registers are
not cleared after the transfer. Therefore, it is possible to continously send C/I codes to
IOM-2 or the U-transceiver by only writing the code into the register once.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PSB21911 | ISDN Echocancellation Circuit for Terminal Applications IEC-Q TE |
| PT3104C | 15 WATT 24V TO 5V/12V/15V ISOLATED DC-DC CONVERTER |
| PT3100-24V | 15 WATT 24V TO 5V/12V/15V ISOLATED DC-DC CONVERTER |
| PT3106C | 15 WATT 24V TO 5V/12V/15V ISOLATED DC-DC CONVERTER |
| PT3402 | "2.5V 12A |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PSF21911F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ISDN Line Interface |
| PSF21911N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:?ISDN Echocancellation Circuit for Terminal Applications - 2B1Q Code? |
| PSF226 | 制造商:Pentair Technical Products / Hoffman 功能描述:Swing Frame, fits 2200x600mm LtGray, fits 2200x600mm, Steel |
| P-SF226 | 制造商:Pentair Technical Products / Hoffman 功能描述:Swing Frame, fits 2200x600mm 制造商:PENTAIR TECNICAL PRODCUTS 功能描述:Swing Frame, fits 2200x600mm |
| PSF227 | 制造商:Pentair Technical Products / Hoffman 功能描述:Swing Frame, fits 2200x700mm LtGray, fits 2200x700mm, Steel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。