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PM8621 Datasheet(PDF) 139 Page - PMC-Sierra, Inc

Part # PM8621
Description  NSE-8G??Standard Product Data Sheet Preliminary
PDF  184 Pages
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Manufacturer  PMC [PMC-Sierra, Inc]
Direct Link  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM8621 Datasheet(HTML) 139 Page - PMC-Sierra, Inc

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NSE-8G™ Standard Product Data Sheet
Preliminary
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
138
Document ID: PMC-2010850, Issue 1
The SBS and NSE-8G devices have two configuration pages controlling the switching of each
DS0 with CAS. The SBS has independent configuration pages for each direction of data flow
through the device. The NSE-8G has one set of configuration pages. System configuration
changes are made by writing to the offline configuration page in all affected devices and then
swapping from the old configuration page to the new configuration page. The TCMP and OCMP
signals control the current configuration page of the SBS and the CMP signal controls the current
configuration page of the NSE. Swapping of configuration pages must be aligned to frame
switching through the system to avoid any possible data corruption. The TCMP, OCMP and CMP
signals are sampled with the SBS IC1FP and RC1FP signals and the NSE-8G RC1FP signals
respectively. The CMP signals can be connected together at the expense of having to ensure all
device configuration pages are current.
Figure 19 shows how the devices are connected together. The following timing diagrams show
the external signals and the internal device frame alignment signal generated from the
programmed delays. Although the CMP signals are sampled externally with the C1FP signals they
are also delayed internally to coincide with the internally delayed frame signals. These are also
shown in the timing diagram. All internal signals are identified by the .INT suffix.
Figure 19 TEMUX-84™/SBS/NSE/SBS/AAL1gator-32™ system DS0 Switching with CAS
SBI336
SBI336S
SBI336S
SBI
IC1FP
TCMP
SBS #1
OC1FP
RC1FP OCMP
DC1FP
TEMUX84
AC1FP
DC1FP
AALIGATOR32
AC1FP
RC1FP
CMP
NSE
RC1FP
OCMP
OC1FP
SBS #2
IC1FP
TCMP
SBS#2 OCMP
NSE CMP
SBS #1 TCMP
C1FP
SBS#2 TCMP
SBS #1 OCMP



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