- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄378057 > PM8621 (PMC-Sierra, Inc.) NSE-8G⑩ Standard Product Data Sheet Preliminary PDF資料下載
參數(shù)資料
| 型號(hào)： | PM8621 |
| 廠商： | PMC-Sierra, Inc. |
| 英文描述： | NSE-8G⑩ Standard Product Data Sheet Preliminary |
| 中文描述： | 網(wǎng)絡(luò)搜索引擎，第八代⑩標(biāo)準(zhǔn)的產(chǎn)品數(shù)據(jù)的初步 |
| 文件頁(yè)數(shù)： | 138/184頁(yè) |
| 文件大?。?/td> | 1122K |
| 代理商： | PM8621 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)第131頁(yè)第132頁(yè)第133頁(yè)第134頁(yè)第135頁(yè)第136頁(yè)第137頁(yè)當(dāng)前第138頁(yè)第139頁(yè)第140頁(yè)第141頁(yè)第142頁(yè)第143頁(yè)第144頁(yè)第145頁(yè)第146頁(yè)第147頁(yè)第148頁(yè)第149頁(yè)第150頁(yè)第151頁(yè)第152頁(yè)第153頁(yè)第154頁(yè)第155頁(yè)第156頁(yè)第157頁(yè)第158頁(yè)第159頁(yè)第160頁(yè)第161頁(yè)第162頁(yè)第163頁(yè)第164頁(yè)第165頁(yè)第166頁(yè)第167頁(yè)第168頁(yè)第169頁(yè)第170頁(yè)第171頁(yè)第172頁(yè)第173頁(yè)第174頁(yè)第175頁(yè)第176頁(yè)第177頁(yè)第178頁(yè)第179頁(yè)第180頁(yè)第181頁(yè)第182頁(yè)第183頁(yè)第184頁(yè)
NSE-8G Standard Product Data Sheet
Preliminary
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2010850, Issue 1
137
Figure 18 “C1” Synchronization Control
Ingress SBI
device
Ingress SBS
(1 frame delay)
Egress SBS
(1 frame delay)
500
μ
s Source
delay
t
1
t
0
,
t
1
t
2
t
3
t
4
delay
125
μ
s
t at 0
μ
s
Egress SBI
device
delay
t
2
delay
t
3
delay
t
4
t
0
NSE
delay
125
μ
s
(no delay t delay through
Ingress SBI device)
12.3
Synchronized Control Setting Changes
The NSE-8G and SBS support dual switch control settings. These dual settings permit one bank
of settings to be operational while the other bank is updated as a result of some new connection
requests. The CMP input selects the current operational switch control settings. CMP is sampled
by the NSE-8G on the RC1FP
.
The internal blocks sample the registered CMP value as they
receive the next C1 character after a delay of RC1DLY. The new CMP value is applied on the first
A1 character of the following STS-12 frame. This switchover is hitless; the control change does
not disrupt the user data flow in any way. This feature is required for the addition of arbitrary new
connections, as existing connections may need to be rerouted (see the discussion of the
connection routing algorithm in this document).
The DS0-granularity switch settings RAM in organized into two control settings banks, these are
switched by the above mechanisms on C1 boundaries. The NSE-8G also has to coordinate the
switching of the connected SBS devices (if using the In-Band link facility), so a broader
understanding of the issues is required.
The following sections provide examples.
12.3.1 SBS/NSE-8G Systems with DS0 and CAS Switching
When building a DS0 and Channel Associated Signaling switching system with the SBS, SBS-lite
and NSE-8G devices the overall timing is based on the CAS signaling multiframe on the SBI bus.
In this configuration the delay through the SBS devices is a single 125 μS SBI frame plus a few
77.76 MHz clocks and the delay through the NSE-8G is a few 77.76 MHz clocks. A single C1FP
frame synchronization signal is distributed around the system. Internal to the SBS and NSE-8G
devices are programmable offsets used to account for propagation delays through the system. The
key constraint is that all SBI frames are aligned going into the NSE-8G device.
Compatible devices are TEMUX-84, FREEDM-336, FREEDM-336-84 bond-out, S/UNI-IMA-
84, and other future SBI336 devices.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PM8621-BIAP | NSE-8G⑩ Standard Product Data Sheet Preliminary |
| PM9311 | Enhanced TT1TM Switch Fabric |
| PM9311-UC | ENHANCED TT1⑩ SWITCH FABRIC |
| PM9312 | Enhanced TT1TM Switch Fabric |
| PM9312-UC | ENHANCED TT1⑩ SWITCH FABRIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PM8621-BIAP | 制造商:PMC 制造商全稱:PMC 功能描述:NSE-8G⑩ Standard Product Data Sheet Preliminary |
| PM87 | 制造商:FERROXCUBE 制造商全稱:Ferroxcube International Holding B.V. 功能描述:PM cores |
| PM87/70-3C94 | 制造商:Yageo / Ferroxcube 功能描述:FERRITE CORE PM 3C94 制造商:Yageo / Ferroxcube 功能描述:FERRITE CORE, PM, 3C94, Core Size:PM87, Material Grade:3C94, Effective Magnetic Path Length:146mm, Ae Effective Cross Section Area:910mm2, Inductance Factor Al:15000nH, SVHC:No SVHC (20-Jun-2013), External Depth:70mm, External , RoHS Compliant: Yes |
| PM871 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。