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PIC17C42A , High-Performance 8-Bit CMOS EPROM/ROM Microcontroller
PIC18F2525-I/SO , 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
PIC18F2620-I/SO , 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
PIC18F2620-I/SO , 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
PIC18F2620-I/SP , 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
PIC18F4620-I/ML , 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
PEB2445NV1.2-PEB2445N-V1.2
MUSAC-A (Multipoint Switching and Con...
ICs for Communications
Multipoint Switching and Conferencing Unit - Attenuation
MUSAC-A
PEB 2445 Version 1.2
Data Sheet02.96
Edition 02.96This 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.A critical component is a component used in a life-support device or system whose failure can reasonably be expected to cause the
PEB 2445
Table of ContentsPage
1Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.1Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
1.2Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.3Pin Definitions and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
1.4Functional Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
1.5Device Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
1.6System Integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
2.1Basic Functional Principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
2.2Microprocessor Interface and Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Operational Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
3.1Reset State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
3.2Initialization Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
3.3Operation with a 4096-kHz Device Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
3.4Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Detailed Register Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
4.1Mode Register (MOD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
4.2Status Register (STA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
4.3Conference Status Register (CST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
4.4Conference Mask Register (CMR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
4.5Indirect Access Register (IAR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
4.6Indirect Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
4.6.1Configuration Register (CFR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
4.6.2Clock Shift Register (CSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
5.1DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
5.2Capacitances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
5.3AC-Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
5.3.1Microprocessor Interface Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
5.3.1.1Intel Bus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
5.3.2PCM Interface Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
5.3.3Clock and Synchronization Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
PEB 2445
Table of ContentsPagePackage Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .667.1Initialization for Conferencing in a PBX . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
7.2Programming a Conference in a PBX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
7.3Programming Procedure for Switching TS’s . . . . . . . . . . . . . . . . . . . . . . . . .68
7.4Programming Procedure for a PBX Conference . . . . . . . . . . . . . . . . . . . . . .69
PEB 2445
Overview
1Overview
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
512 incoming 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 ofswitching 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 offers a 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 anupward compatible 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.
