- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄378089 > PXB4350E (INFINEON TECHNOLOGIES AG) ICs for Communications PDF資料下載
參數(shù)資料
| 型號： | PXB4350E |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | ICs for Communications |
| 中文描述： | 通信集成電路 |
| 文件頁數(shù)： | 31/185頁 |
| 文件大小： | 2552K |
| 代理商： | PXB4350E |
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頁當(dāng)前第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頁第165頁第166頁第167頁第168頁第169頁第170頁第171頁第172頁第173頁第174頁第175頁第176頁第177頁第178頁第179頁第180頁第181頁第182頁第183頁第184頁第185頁
3;%(
Data Sheet
2-31
04.2000
)XQFWLRQDO'HVFULSWLRQ
The actual F5-AIS/RDI state is indicated by bits 14..19 in Dword2 of the downstream external
Ram entry (
VHFWLRQ
page 114) and the upstream external RAM entry (
VHFWLRQ
page 102). For the actual F4-AIS/RDI state information use bits 22..27 in Dword4 of the
downstream external RAM entry (
VHFWLRQ
entry (
VHFWLRQ
page 105
). The μP is informed by the interrupts DCSTTR for downstream
F5, UCSTTR for upstream F5, DPSTTR for downstream F4 and UPSTTR for upstream F4 state
transitions (
VHFWLRQ
page 83).
Both forward and backward cell insertions are initiated by the SCAN mechanism
(see
VHFWLRQ
). All delay times given are default values, recommended by [ ]. The
PXB 4340 AOP allows to program these values in multiples of the 0.5 second SCAN period
given by the microprocessor. Therefore consider the register description of SCCONF1 (see
VHFWLRQ
page 79).
The 0.5 second SCAN period determines the insertion delay for OAM cells. If the SCAN
mechanism has passed a connection entry just before an AIS condition became true the
maximum waiting time for the next SCAN access is about 0.5 second.
page 116) and the upstream external RAM
$70/D\HU)DLOXUHV&&
The mechanism to detect failures like misrouting is the Continuity Check (CC). Its idea is to insert
dummy cells in a connection if it is inactive, i.e. if the user is not sending data cells. The dummy
cells are called CC OAM cells and are inserted at the originating end/segment point of a
connection after a one second absence of user cells. The repetition interval is also one second.
At the connection/segment endpoint the CC cells are discarded. If no user or OAM cells are
received within 3.5 seconds the Loss of Continuity (LOC) defect state is declared. Like AIS state
LOC causes the automatic insertion of VP-AIS or VC-AIS cells for the affected connections. If
LOC is detected at a terminating endpoint RDI cells are generated in backward direction.
)LJXUH
shows an example for the operation of CC: two VCCs entering a switch at ports a and
b should both be forwarded to port c. Due to misrouting within the switching fabric the cells of
VCC b are forwarded to an unconnected switch output, where they are lost without being
notified. The CC detection function at port c, however, detects the absence of user cells after the
3.5 seconds time-out and inserts VC-AIS cells for connection b.
The time values given are values recommended in [6]. The PXB 4340 AOP allows to progam
them in a wide range.
The PXB 4340 AOP supports the CC function for all 16384 connections in both up- and
downstream direction. Setting one bit in the respective connection RAM is sufficient to activate
the origination or the termination of a CC flow. This is bit 11 in Dword1 (up-/downstream) for
originating F5 segment CC, bit 10 in Dword1 (up-/downstream) for originating F5 end-to-end CC
and bit 11 in Dword4 (up-/downstream) for originating F4 segment CC (see
VHFWLRQ
98). All other actions are automatic:
At the CC origination point (see
ILJXUH
and
ILJXUH
continuous supervision of user cell stream (see
ILJXUH
, marker
)
periodic insertion of CC cells in one second intervals after one second (standard) time-out
(see
ILJXUH
, marker
)
page
):
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PXB4330E | ICs for Communications |
| PXF4222 | Interworking Controller Next Generation |
| PXF4222E | Interworking Controller Next Generation |
| PXF4225E | ATM Interworking Controller |
| PXF4333 | ABM 3G ATM Buf fer Manager |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PXB4360F | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Communications |
| PXB4360F-V11 | 制造商:Infineon Technologies AG 功能描述:COMMUNICATION CONTENT ADDRESSABLE MEMORY ELEMENT CAME 144P-TQFP-144-2 |
| PXB-B3911 | 制造商:PARKER HANNIFIN INSTRUMENTS 功能描述:4MM NC VALVE |
| PXB-B3921 | 制造商:PARKER HANNIFIN INSTRUMENTS 功能描述:4MM NO VALVE |
| PXC.M0.2GG.NG | 功能描述:環(huán)形推拉式連接器 2P FEM R/A RCPT KEY 2NUTS GRY FNT NUT RoHS:否 制造商:Hirose Connector 產(chǎn)品類型:Connectors 系列:HR10 觸點(diǎn)類型:Socket (Female) 外殼類型:Receptacle 觸點(diǎn)數(shù)量:4 外殼大小:7 安裝風(fēng)格:Panel 端接類型:Solder 電流額定值:2 A |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。