PEB2245NV1.2 ,MUSAC (Multipoint Switching and Confe...Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
PEB22522FV2.1 ,MULTI BIT RATE INTEGRATED CIRCUIT MDSL (Medium bit rate Digital Using the ..
PEB22522FV2.1 ,MULTI BIT RATE INTEGRATED CIRCUITFeatures
PEB2245NV1.2
MUSAC (Multipoint Switching and Confe...
ICs for Communications
Multipoint Switching and Conferencing Unit - Attenuation
MUSAC
PEB 2245 Version 1.2
Data Sheet03.96
T2245-XV12-D1-7600
Edition 03.96This edition was realized using the software system FrameMaker.
Published by Siemens AG,
Bereich Halbleiter, Marketing-
Kommunikation, Balanstraße 73,
81541 München© Siemens AG 1996.
All Rights Reserved.
Attention please!As far as patents or other rights of third parties are concerned, liability is only assumed for components, not for applications, processes
and circuits implemented within components or assemblies.
The information describes the type of component and shall not be considered as assured characteristics.
Terms of delivery and rights to change design reserved.
For questions on technology, delivery and prices please contact the Semiconductor Group Offices in Germany or the Siemens Companies
and Representatives worldwide (see address list).
Due to technical requirements components may contain dangerous substances. For information on the types in question please contact
your nearest Siemens Office, Semiconductor Group.
Siemens AG is an approved CECC manufacturer.
PackingPlease use the recycling operators known to you. We can also help you – get in touch with your nearest sales office. By agreement we
will take packing material back, if it is sorted. You must bear the costs of transport.
For packing material that is returned to us unsorted or which we are not obliged to accept, we shall have to invoice you for any costs in-
curred.
Components used in life-support devices or systems must be expressly authorized for such purpose!Critical components1 of the Semiconductor Group of Siemens AG, may only be used in life-support devices or systems2 with the express
written approval of the Semiconductor Group of Siemens AG.
PEB 2245
Table of ContentsPage
1Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.1Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.2Pin Configuration
(top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
1.3Pin Definitions and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
1.4Functional Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.5Device Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
1.6System Integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
2.1Basic Functional Principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
2.2Microprocessor Interface and Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Operational Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
3.1Reset State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
3.2Initialization Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
3.3Operation with a 4096-kHz Device Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
3.4Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Detailed Register Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
4.1Mode Register (MOD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
4.2Status Register (STA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
4.3Conference Status Register (CST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
4.4Conference Mask Register (CMR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
4.5Indirect Access Register (IAR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
4.6Indirect Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
5.1Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
5.2DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
5.3Capacitances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
5.4AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
5.5Microprocessor Interface Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
5.5.1Motorola Bus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Conference Applications of the MUSACTM . . . . . . . . . . . . . . . . . . . . . . . .57
Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
PEB 2245
Table of ContentsPageAppendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .668.1Initialization for Conferencing in a PBX . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
8.2Programming a Conference in a PBX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
8.3Programming Procedure for Switching TS’s . . . . . . . . . . . . . . . . . . . . . . . . .68
8.4Programming Procedure for a PBX Conference . . . . . . . . . . . . . . . . . . . . . .69
PEB 2245Overview
A Complete Family of Efficient SolutionsIf the issue is digital switching and conferencing, the solution is flexibility, capacity, and economy.
Siemens Semiconductor offers the most economical answer to all conceivable applications in this
field. Our complete family of switching network devices satisfies even the most rigorous switching
demands.
A Complete Family of Efficient SolutionsTake our
MTSC (Memory Time Switch CMOS) PEB 2045 with a switching capability of 512incoming PCM channels to 256 outgoing PCM channels. It has the perfect size to economically
build medium sized switches. The design of a non-blocking switch for 512 PCM channels is possible
with a simple parallel configuration with a second MTSC.
If you need a non-blocking switch for up to 256 channels, we offer a smaller version of the MTSC,
the MTSS (Memory Time Switch Small) PEB 2046. And the MTSL (Memory Time Switch Large)
PEB 2047, the largest in our family, is capable of switching 1024 PCM channels.Siemens also supplies the best solution for conferencing, our MUSAC (Multipoint Switching and
Conferencing Unit) PEB 2245 performs the complete switching functions of the MTSC, and offersa signal processor for handling up to 64 conferencing channels in any combination. The input and
output channels can also be attenuated individually to achieve best transmission quality.
The
MUSAC-A (Multipoint Switching and Conferencing Unit) PEB 2445 is an upwardcompatible device to the MTSC and MUSAC. It offers in addition the attenuation and amplification
of every time slot.
Pin compatible device allow simplicity in hardware and software design. To allow for more flexibility,
the PCM data rate can be 2, 4, or 8 Mbit/s – configurable also for mixed use.
