Clock and Control Module (CCM) Specification … Specification v1.0.pdfClock and Control Module...

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OPEN BASE STATION ARCHITECTURE INITIATIVEClock and Control Module (CCM) Specification

Version 1.0

OPEN BASE STATION ARCHITECTURE INITIATIVE

Issue 1.0 2 (29)

Preface1

OBSAI Specification documents are developed within the Technical Working Groups 2of the Open Base Station Architecture Initiative Special Interest Group (OBSAI SIG). 3Members of the OBSAI TWG serve voluntarily and without compensation. The 4specifications developed within OBSAI represent a consensus of the broad expertise 5on the subject within the OBSAI SIG.6

Use of an OBSAI Specification is wholly voluntary. The existence of an OBSAI 7Specification does not imply that there are no other ways to produce, test, measure, 8purchase, market, or provide other goods and services related to the scope of the 9OBSAI Specification. Furthermore, the viewpoint expressed at the time a 10specification is approved and issued is subject to change brought about through 11developments in the state of the art and comments received from users of the 12specification. Every OBSAI Specification is subjected to review in accordance with 13the Open Base Station Architecture Initiative Rules And Procedures.14

Implementation of all or part of an OBSAI Specification may require licenses under 15third party intellectual property rights, including without limitation, patent rights (such a 16third party may or may not be an OBSAI Member). The Promoters of the OBSAI 17Specification are not responsible and shall not be held responsible in any manner for 18identifying or failing to identify any or all such third party intellectual property rights.19

The information in this document is subject to change without notice and describes 20only the product defined in the introduction of this documentation. This document is 21intended for the use of OBSAI Member’s customers only for the purposes of the 22agreement under which the document is submitted, and no part of it may be 23reproduced or transmitted in any form or means without the prior written permission of 24OBSAI Management Board. The document has been prepared to be used by 25professional and properly trained personnel, and the customer assumes full 26responsibility when using it. OBSAI Management Board, Marketing Working Group 27and Technical Working Group welcome customer comments as part of the process of 28continuous development and improvement of the documentation. 29

The information or statements given in this document concerning the suitability, 30capacity, or performance of the mentioned hardware or software products cannot be 31considered binding but shall be defined in the agreement made between OBSAI 32members. However, the OBSAI Management Board, Marketing Working Group or 33Technical Working Group have made all reasonable efforts to ensure that the 34instructions contained in the document are adequate and free of material errors and 35omissions. 36

OBSAI liability for any errors in the document is limited to the documentary correction 37of errors. OBSAI WILL NOT BE RESPONSIBLE IN ANY EVENT FOR ERRORS IN 38THIS DOCUMENT OR FOR ANY DAMAGES, INCIDENTAL OR CONSEQUENTIAL 39(INCLUDING MONETARY LOSSES), that might arise from the use of this document 40or the information in it.41

This document and the product it describes are considered protected by copyright 42according to the applicable laws.43

OBSAI logo is a registered trademark of Open Base Station Architecture Initiative 44Special Interest Group. 45

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Other product names mentioned in this document may be trademarks of their 1respective companies, and they are mentioned for identification purposes only.2

Copyright © Open Base Station Architecture Initiative Special Interest Group. All rights 3reserved.4

Users are cautioned to check to determine that they have the latest edition of any 5OBSAI Specification. 6

Interpretations: Occasionally questions may arise regarding the meaning of portions of 7standards as they relate to specific applications. When the need for interpretations is 8brought to the attention of OBSAI, the OBSAI TWG will initiate action to prepare 9appropriate responses. Since OBSAI Specifications represent a consensus of OBSAI 10Member’s interests, it is important to ensure that any interpretation has also received 11the concurrence of a balance of interests. For this reason OBSAI and the members of 12its Technical Working Groups are not able to provide an instant response to 13interpretation requests except in those cases where the matter has previously 14received formal consideration. 15

Comments on specifications and requests for interpretations should be addressed to:16

Peter Kenington17Chairman, OBSAI Technical Working Group18Linear Communications Consultants Ltd.19Email: [email protected]

21


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Contents

1 Summary of changes.........................................................................................72 Scope ..................................................................................................................83 General................................................................................................................9

3.1 Topology and Dimensioning Requirements ..................................................93.2 Hot Insertion and Removal............................................................................93.3 Signal Naming Conventions........................................................................103.4 Connector Naming and Orientation.............................................................12

4 CCM Interfaces .................................................................................................144.1 Signal List ...................................................................................................144.2 Signal Specification.....................................................................................16

4.2.1 Common Signals..................................................................................164.2.2 CCM Specific Signals ..........................................................................164.2.3 Redundancy Signals ............................................................................224.2.4 CCM Unspecified Signals ....................................................................234.2.5 CCM Power Signals.............................................................................23

5 CCM Pin Assignments .....................................................................................245.1 J1 Data Connector ......................................................................................245.2 J2 Data Connector ......................................................................................255.3 Power Connector ........................................................................................26

6 Glossary............................................................................................................276.1 Abbreviations ..............................................................................................276.2 Definition of Terms ......................................................................................27

7 References........................................................................................................297.1 OBSAI .........................................................................................................297.2 IEEE............................................................................................................297.3 ANSI............................................................................................................29


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Figures

Figure 2-1 BTS Reference Architecture.......................................................................8

Figure 3-1 Signal Direction Definition ........................................................................11

Figure 3-2 Connector Positions and Naming (Module Rear View) ............................13

Figure 4-1 TOUT_SYNC Timing.........................................................................................21

Figure 4-2 Redundancy Connection Scheme............................................................23


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List of Tables

Table 3-1 CCM Signal Abbreviations ........................................................................10

Table 4-1 CCM Interface signal list ...........................................................................15

Table 4-2 Reference Clock Electrical Parameters.....................................................17

Table 4-3 PPS Clock Electrical Parameters ..............................................................18

Table 4-4 Aux Clock Electrical Parameters ...............................................................19

Table 4-5 System Clock Electrical Parameters .........................................................20

Table 4-6 System Synchronization Signal Electrical Parameters ..............................21

Table 5-1 Data Connector J1 Pin Assignment (module rear view) ............................24

Table 5-2 Data Connector J2 Pin Assignment (rear view).........................................25

Table 5-3 CCM power connector P1 Pin Assignment ...............................................26

Table 5-4 CCM optional power connector P2 Pin Assignment ..................................26


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1 Summary of changes1

2

Version Approved by Date

0.01 Draft 14-Dec-2003

0.02 Draft 18-Dec-2003

0.03 Draft 3-Feb-2004

0.04 Draft 5-Feb-2004

0.05 Draft 4-Mar-2004

0.06 Draft 9-Mar-2004

0.07 Draft 14-Apr-2004

0.08 Draft 13-May-2004

0.09 Draft 19-May-2004

0.10 Draft 15-June-2004

0.11 Draft 25-June-2004

1.0 OBSAI Management Board 6th July 2004

3

4


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2 Scope 1

2

This document specifies the base transceiver system (BTS) internal interfaces (i.e., System 3Interfaces) of the OBSAI Clock and Control Module (CCM). It defines the CCM’s physical 4implementation of OBSAI reference point RP1 and the required interconnection scheme to 5other BTS modules as illustrated in Figure 2-1 below.6

7

TransportBlock

Control and ClockBlock

BaseBandBlock

RFBlock

RP1

RP2 RP3

Iub orAbis

ProprietaryBlockPower

RP4

ControlTrafficClockPower

8

Figure 2-1 BTS Reference Architecture9


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3 General1

This specification focuses on the physical interface requirements of the CCM. The 2actual BTS and CCM designs are out of the scope of this document. Guidelines for 3implementation are given where appropriate.4

3.1 Topology and Dimensioning Requirements5

The BTS internal interface provided by the CCM supports the following functions:6

� Internal Networking functions via RP17

� Synchronization functions via RP18

Internal Networking functions are based on LAN concepts using Ethernet as the 9Layer 2 protocol. Each module in the shelf has a dedicated link to the fabric. 10

The CCM distributes system clocks and synchronization bursts to other modules in 11one shelf using a star topology.12

Clock and Control Module redundancy is supported optionally by a second CCM, 13forming the center of a second clock and synchronization network (double star 14topology). See section 4.2.3 for details on redundancy.15

The CCM optionally supports shelf extension, with a point-to-point connection to a 16clock and synchronization network in a second shelf. See the OBSAI RP2 17Specification [OBSAI RP2] for details on shelf extension.18

3.2 Hot Insertion and Removal19

All signals shall support hot insertion and removal. Hot insertion is supported on the 20module by delayed (insertion) and early (removal) switch on/off of the power supply 21by means of a last mating enable pin at the power connector. Every source and sink 22of a signal shall survive without any damage, if the connected signal is within its 23specified operating voltage range.24


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3.3 Signal Naming Conventions1

All signal names start with a 2-4-letter abbreviation that describes the general 2function of the signal group. 3

4

Abbreviation Full Name Comment

MA Module Address -

SA Shelf Address -

MNC Module Not Connected Not Connected on Module

FP Fabric Port -

SCLK System Clock -

RCLK Reference Clock -

SYNC Synchronization Signal -

PPSCLK 1 PPS Clock -

AUXCLK Auxiliary Clock -

CCMUS CCM Unspecified -

RC Redundancy Control -

RCL Redundancy Communication Link -

GND Ground Digital Ground

BPNC Backplane Not Connected Not Connected on Backplane

Table 3-1 CCM Signal Abbreviations5

The signal name abbreviation is followed by a numerical index to distinguish between 6instances of a signal inside a signal group. The index starts with the value “0”.7

Additionally a direction indication is attached for signal groups with receive (_RX), 8transmit (_TX), or bidirectional (_BI) signals, if there is a need to distinguish between 9them. The direction is derived from the physical characteristics at the module 10boundary. The direction of signals not explicitly indicated by the signal name is 11specified in the signal list (section 4.1), or left unspecified intentionally.12


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Module

RX

TX

BI

1

Figure 3-1 Signal Direction Definition2

A signal group supporting more than one differential pair (e.g. 1000 Base-T) uses 3alphabetic letters starting with “DA” (e.g. DA, DB, DC, …).4

Finally, differential pair signals are denoted by a trailing + (positive) or – (negative) 5symbol.6

The following rule applies:7

8

Signal Name Abbreviation [Numerical Index] [_RX;_TX;_BI][DPair Index] [+;-]

9


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3.4 Connector Naming and Orientation1

Definitions:2

� Female connectors use the reference designator prefix J3

� Male connectors use the reference designator prefix P4

� Mechanical guiding pins use the reference designator prefix G5

� Mechanical guiding holes use the reference designator prefix H6

A numerical index follows the designator prefix. 7

The following rule applies to the module:8

Prefix [Module Index]

9

This concept also applies to the backplane connectors. Although this is not within the 10scope of this specification, it is nevertheless recommended to follow this guidance. In 11addition to the module index, the backplane has a slot index, which references the 12slot position. 13

The following rule applies to the backplane:14

Prefix [Module Index] [Slot Index]

15

Figure 3-2 shows the module connector naming.16


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Power Connector 1

Optional Power Connector 2

Data Connector 1(with Guide)

Optional Data Connector 2

PC

B

1 2

P1 1

J2

1

J1

1

P2 1

1

Figure 3-2 Connector Positions and Naming (Module Rear View)2


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4 CCM Interfaces 1

4.1 Signal List2

The CCM signal groups and the expected peer modules are listed below:3

4

No Signal Group Peer Module Comment Direction Technology

Common Signals

1 SA[0..2] Not applicable Shelf address (3 bit) I -

2 MA[0..4] Not applicable Module address (5 bit) I -

3 FP[0..1]_TX[+,-] TM Fabric Port 0 and 1 O 100 Base-TX

4 FP[0..1]_RX[+,-] TM Fabric Port 0 and 1 I 100 Base-TX

5 BPNC Not applicable Proprietary test and debug signals

unspecified unspecified

6 GND Not applicable Digital Ground - -

CCM Specific Signals

7 RCLK[0..1][+,-] TM[0..1] 8 kHz Reference Clock I LVDS

8 RA[+,-] CCM 2 Redundancy Communication Link

unspecified 100 Ohm diff.

9 RB[+,-] CCM 2 Redundancy Communication Link

unspecified 100 Ohm diff.

10 RC[0..3] CCM 2 Redundancy Control unspecified unspecified

11 RD[0..3] CCM 2 Redundancy Control unspecified unspecified

12 SCLK[0..30][+,-] Not identified 1 System Clock Port O LVDS

13 SYNC[0..30][+,-] Not identified 1 Synchronization Port O LVDS

14 PPSCLK[0..1][+,-] PM 1 Pulse-per-second I LVDS


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15 AUXCLK[0..1][+,-] Not identified 10MHz Auxiliary Clock I LVDS


17 MNC Not applicable No Connection on Module

- -

CCM Unspecified Signals

18 CCMUS[0..11] Not applicable Proprietary Signals unspecified -

CCM Power Signals

19 PWR_POS Not applicable Supply Positive - Power

20 PWR_NEG Not applicable Supply Negative - Power

21 PWR_ENA Not applicable Power Enable I -


Table 4-1 CCM Interface signal list1

Note 1: Could be any other module2Note 2: Peer is the backup CCM module in the protection group.3


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4.2 Signal Specification1

This chapter specifies the CCM interface signals at the CCM boundary. The data and 2power connector signals are differentiated in 4 groups:3

� Common Signals4

� CCM Specific Signals5

� CCM Unspecified Signals6

� Power7

If necessary, additional requirements for the implementation are given in the relevant 8signal subchapter.9

4.2.1 Common Signals10

Common signals are common to all modules and shall be supported. Common 11Signals are assigned to fixed pin positions within the data connector J1, which is 12present in all modules. Since the CCM sources the System Clocks and 13Synchronization Signals to other modules, these are not included in the Common 14signal group of the CCM.15

4.2.1.1 Module and Shelf address16

The module (MA[0..4]) and shelf address signals (SA[0..2]) are used to give the 17module a unique hardwired address related to the shelf and slot position of the 18module. 19

The CCM shall pull the address pins up. An address bit logic one is indicated by 20leaving the address pin unconnected on the backplane. A logic zero is indicated 21through connecting the respective pin to logic ground on the backplane. The address 22signals are static.23

4.2.1.2 Ethernet Fabric Ports24

The common fabric ports 0 and 1 are available on every module in the shelf. On the 25CCM module these ports are Fast Ethernet [100Base-TX] according to [IEEE 802.3]26clause 25.27

4.2.2 CCM Specific Signals28

CCM specific signals are specific to the CCM and shall be supported. CCM specific 29signals are assigned to fixed pin positions at the data connector J1.30


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4.2.2.1 Reference Clock Inputs1

The Transport Modules in the shelf can provide 8.000kHz reference clock signals to 2the CCM. These clocks can be used as frequency references for the system clock.3

The reference clock links in the system are point-to-point.4

The CCM shall have two differential clock inputs - one from each of the two TMs, 5which together form a redundant pair.6

The reference clock timing parameters are specified according to the OBSAI RP1 7Specification [OBSAI RP1].8

The maximum jitter and wander of the Reference Clock is determined by those 9qualities of the external network connected to the TM.10

The electrical receiver characteristic of the CCM Reference Clock input shall follow 11the LVDS standard ANSI/TIA/EIA-644-A [ANSI1]. 12

The CCM shall terminate these backplane clock links with a differential impedance of 13100 � � 20%. 14

Parameter Symbol Min Typical Max Unit

Receiver Input Threshold VTH - - � 100 mV

Differential Input Voltage VID � 100 - � 600 mV

Input Current (Power On) IIN_ON - - � 20 uA

Input Current (Power Off) IIN_OFF - - � 20 uA

Input Voltage Range VIN 0 - 2.4 V

Differential Input Impedance ZIN 80 100 120 �

Table 4-2 Reference Clock Electrical Parameters15

In the CCM power-down state the receiver input shall be in a high impedance state.16

4.2.2.2 PPS Clock Inputs17

Proprietary Modules in the shelf can provide 1 pulse-per-second clocks for the CCM 18module. This clock can be used as a time reference for Synchronization Bursts as 19well as a frequency reference for System Clocks.20

The 1 pulse-per-second clock links (PPSCLK) are point-to-point.21


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The CCM shall have two differential PPSCLK inputs - for up to two PM's, which 1together could form a redundant pair.2

The 1 pulse-per-second clock timing parameters are specified according to the RP1 3Specification [OBSAI RP1]. PPS timing is referenced to the clock rising edge.4

The electrical receiver characteristic of the CCM PPSCLK input shall follow the LVDS 5standard ANSI/TIA/EIA-644-A [ANSI1]. 6

The CCM shall terminate the PPS links with a differential impedance of 100 � � 20%. 7

8




Input Current (Power On) IIN_ON - - �20 uA

Input Current (Power Off) IIN_OFF - - �20 uA



Table 4-3 PPS Clock Electrical Parameters9

In the CCM power-down state the receiver input shall be in a high impedance state.10

4.2.2.3 Auxiliary Clock Inputs11

This clock can be used as a frequency reference for the System Clock.12

The Auxiliary clock links (AUXCLK) are point-to-point.13

The CCM shall have two differential Aux clock inputs - for up to two sources, which 14together could form a redundant pair. These inputs shall support a 10MHz auxiliary 15clock, and may support other reference frequencies.16

The electrical receiver characteristics of the CCM auxiliary clock input shall follow the 17LVDS standard ANSI/TIA/EIA-644-A [ANSI1]. 18

The CCM shall terminate the Aux links with a differential impedance of 100 � � 20%. 19

20


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Input Current (Power On) IIN_ON - - �20 uA




Table 4-4 Aux Clock Electrical Parameters1

In CCM power-down state the receiver input shall be in high impedance state.2

4.2.2.4 System Clock Outputs3

The CCM shall provide a 30.72MHz System Clock (SCLK) to other modules in the 4shelf. It can also be extended to another shelf through an extension module. This 5System Clock can be used as a frequency reference for other modules.6

While inputs 8kHz, AUXCLK, or PPSCLK are accurate to 0.016 parts per million 7(PPM), the System Clock Outputs shall meet the System Clock parameters specified 8in the RP1 Specification [OBSAI RP1].9

In the absence of a timing reference (hold-over), the System Clock Outputs shall drift 10no more than 0.016 PPM in 24 hours.11

The System Clocks are delivered through multiple point-to-point links.12

The System Clock timing parameters are specified in the RP1 Specification [OBSAI 13RP1].14

The electrical transmitter characteristics of the CCM System Clock output shall follow 15the LVDS standard ANSI/TIA/EIA-644-A [ANSI1]. 16

The output impedance for the System Clock signal should be 100 � � 20%. 17


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Transmitter Differential Output Voltage

VOD 247 - 454 mV

Transmitter Offset Voltage VOS 1.125 - 1.375 V


System Clock Rise/Fall time tRISE/FALL - - 3 ns

System Clock to Clock Skew tCC - - 5 ns

Table 4-5 System Clock Electrical Parameters1

In the CCM power-down state, the transmitter output shall be in a high impedance 2state.3

4.2.2.5 System Synchronization Signal Outputs4

The System Synchronization Signal (SYNC) provides frame timing and time 5stamping in the form of synchronization bursts. These bursts of information are 6synchronous to the System Clock and have timing parameters and data formatting as 7specified in the RP1 Reference Point Specification [OBSAI RP1].8

The System Synchronization Signals are delivered through multiple point-to-point 9links.10

The electrical transmitter characteristics of the System Synchronization Signals shall 11follow the LVDS standard ANSI/TIA/EIA-644-A [ANSI1]. 12

The output impedance for the System Synchronization Signal should be 100 � �1320%. 14

In addition to the timing and data formatting requirements indicated in [OBSAI RP1], 15the CCM shall satisfy the “TOUT_SYNC” setup timing parameter as described in Figure 164-1and Table 4-6.17

18


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SYNC

SCLK

TOUT_SYNC =-6.5ns (min), +6.5ns (max)

1

Figure 4-1 TOUT_SYNC Timing2

3


Transmitter Differential Output Voltage

VOD 247 - 454 mV

Transmitter Offset Voltage VOS 1.125 - 1.375 V


System Clock (SCLK) to System Synchronization Signal (SYNC) Delay

tQUT_SYNC -8 - +8 ns

Table 4-6 System Synchronization Signal Electrical Parameters4

In the CCM power-down state the transmitter output shall be in a high impedance 5state.6


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4.2.3 Redundancy Signals1

Redundancy Signals form a link between two peer CCM's. They comprise 2Redundancy Control Signals (RC[0..3], RD[0..3]) and Redundancy Communication 3Link Signals (RA+/-, RB+/-). If redundancy is supported, the interconnection scheme 4shown in Figure 4-2 shall be applied.5

It is expected that modules in a redundant pair are from the same type and vendor. 6Therefore, the functional and timing characteristics of the Redundancy Signals are 7not specified. 8

The Redundancy Communication Link on the CCM shall be 100 � differential pair. 9The electrical characteristics of the Redundancy Signals are not specified.10

In the CCM power-down state, the Redundancy Control Signals shall be in a high 11impedance state.12


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RD3

RD2

RD1

RD0

RC3

RC2

RC1

RC0

RB-

RB+

RA-

RA+

CCM Module 1

RD3

RD2

RD1

RD0

RC3

RC2

RC1

RC0

RB-

RB+

RA-

RA+

CCM Module 2

1

Figure 4-2 Redundancy Connection Scheme2

4.2.4 CCM Unspecified Signals3

CCM Unspecified Signals are optional. Their functional and electrical characteristics 4are not specified. If present, CCM Unspecified Signals shall be assigned to fixed pin 5positions on the data connectors J1 and J2.6

Connecting CCM Unspecified Signals may cause incompatibility with certain 7backplane configurations.8

4.2.5 CCM Power Signals9

For power requirements and limits, see the OBSAI System Reference Document 10[OBSAI System]11


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5 CCM Pin Assignments 1

5.1 J1 Data Connector2

The data connector is specified in the OBSAI System Reference Document [OBSAI 3System] Appendix C. Coding style 3 shall be used.4

5

J1 f e d c b a1 SA0 BPNC BPNC BPNC BPNC BPNC2 SA1 BPNC BPNC BPNC BPNC BPNC3 SA2 GND GND BPNC GND GND4 GND MNC FP1_TX+ GND MNC FP0_TX+5 GND MNC FP1_TX- GND MNC FP0_TX-6 GND MNC FP1_RX+ GND MNC FP0_RX+7 GND MNC FP1_RX- GND MNC FP0_RX-8 AUXCLK1+ MA4 MA3 MA2 MA1 MA09 AUXCLK1- GND BPNC GND BPNC GND

10 BPNC AUXCLK0+ GND RCLK1+2 GND RCLK0+2

11 BPNC AUXCLK0- GND RCLK1-2 GND RCLK0-2

12 CCMUS0 GND PPSCLK0+ GND PPSCLK0+ GND13 CCMUS1 GND PPSCLK1- GND PPSCLK1- GND14 CCMUS2 CCMUS3 GND RB+ GND RA+15 RC3 RC2 RC1 RB- RC0 RA-16 RD3 RD2 RD1 GND RD0 GND17 CCMUS4 CCMUS5 GND SYNC0+ GND SCLK0+18 CCMUS6 GND GND SYNC0- GND SCLK0-19 GND SYNC2+ SYNC1+ GND SCLK2+ SCLK1+20 GND SYNC2- SYNC1- GND SCLK2- SCLK1-21 GND SYNC4+ SYNC3+ GND SCLK4+ SCLK3+22 GND SYNC4- SYNC3- GND SCLK4- SCLK3-23 GND SYNC6+ SYNC5+ GND SCLK6+ SCLK5+24 GND SYNC6- SYNC5- GND SCLK6- SCLK5-

Table 5-1 Data Connector J1 Pin Assignment (module rear view)6

Note 1: Common Signals (section 4.2.1) are indicated by an underline.7


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Note 2: These signals are not part of the common signal group, since the CCM 1sources SCLK and SYNC.2

5.2 J2 Data Connector3

4

J2 f e d c b a1 GND SYNC8+ SYNC7+ GND SCLK8+ SCLK7+2 GND SYNC8- SYNC7- GND SCLK8- SCLK7-3 GND SYNC10+ SYNC9+ GND SCLK10+ SCLK9+4 GND SYNC10- SYNC9- GND SCLK10- SCLK9-5 GND SYNC12+ SYNC11+ GND SCLK12+ SCLK11+6 GND SYNC12- SYNC11- GND SCLK12- SCLK11-7 GND SYNC14+ SYNC13+ GND SCLK14+ SCLK13+8 GND SYNC14- SYNC13- GND SCLK14- SCLK13-9 GND SYNC16+ SYNC15+ GND SCLK16+ SCLK15+

10 GND SYNC16- SYNC15- GND SCLK16- SCLK15-11 GND SYNC18+ SYNC17+ GND SCLK18+ SCLK17+12 GND SYNC18- SYNC17- GND SCLK18- SCLK17-13 GND SYNC20+ SYNC19+ GND SCLK20+ SCLK19+14 GND SYNC20- SYNC19- GND SCLK20- SCLK19-15 GND SYNC22+ SYNC21+ GND SCLK22+ SCLK21+16 GND SYNC22- SYNC21- GND SCLK22- SCLK21-17 GND SYNC24+ SYNC23+ GND SCLK24+ SCLK23+18 GND SYNC24- SYNC23- GND SCLK24- SCLK23-19 GND SYNC26+ SYNC25+ GND SCLK26+ SCLK25+20 GND SYNC26- SYNC25- GND SCLK26- SCLK25-21 GND SYNC28+ SYNC27+ GND SCLK28+ SCLK27+22 GND SYNC28- SYNC27- GND SCLK28- SCLK27-23 GND SYNC30+ SYNC29+ GND SCLK30+ SCLK29+24 GND SYNC30- SYNC29- GND SCLK30- SCLK29-

Table 5-2 Data Connector J2 Pin Assignment (rear view)5


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5.3 Power Connector1

CCM modules shall be equipped with a power connector P1 (OBSAI Sequenced), as2specified in Table 5-3.3

4

P1 Signal1 PWR_POS2 PWR_ENA3 PWR_NEG4 GND

Table 5-3 CCM power connector P1 Pin Assignment5

For additional supply current, CCM modules may optionally be equipped with a 6second power connector P2 (OBSAI Sequenced or OBSAI Non-sequenced), as7specified in Table 5-4.8

9

P2 Signal1 PWR_POS2 PWR_POS1

3 PWR_NEG4 PWR_NEG1

Table 5-4 CCM optional power connector P2 Pin Assignment10

Note 1: Pins 2 and 4 can only be used with the OBSAI Non-sequenced connector.1112


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6 Glossary1

6.1 Abbreviations2

For the purposes of the present document, the following abbreviations 3apply:4

ABBREVIATION DESIGNATION

BBM Base Band Module

BTS Base Transceiver Station

CCM Clock and Control Module

ESD Electrostatic Discharge

GND Ground

LVDS Low Voltage Differential Signaling

OBSAI Open Base Station Architecture Initiative

PM Proprietary Module

RFM Radio Frequency Module

RP1 Reference Point 1



TM Transport Module

6.2 Definition of Terms5

For the purposes of the present document, the following terms and 6definitions apply:7

Common Signals: Common Signals are common to all modules and 8shall be supported. Common Signals are assigned to fixed pin positions 9within the Data Connector(s) which are present at all modules.10

Module Type Specific Signals: Module Type Specific Signals are 11specific to a certain module types (TM, CCM, BBM, RFM, PM) and shall 12be supported. Module Type specific Signals shall be assigned to fixed 13pin positions within the Data Connector(s).14


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Module Type Unspecified Signals: Module Type Unspecified Signals 1are optional. Their functional and electrical characteristics are not 2specified. If present, Module Type Unspecified Signals shall be 3assigned to a range of pin positions within the Data Connector(s). The 4range of pin positions shall be fixed for a certain module type, but may 5differ between module types.6

Signal Group: A group of signals forming a functional entity e.g. a 7fabric port.8

9

10


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7 References1

7.1 OBSAI2

[OBSAI System] OBSAI System Reference Document V1.03

[OBSAI RP1] OBSAI Reference Point 1 Specification V1.04

[OBSAI RP2] OBSAI Reference Point 2 Specification V1.05

7.2 IEEE6

[IEEE 802.3] IEEE Std, 802.3, Local and Metropolitan Area 7Networks, 2002.8

7.3 ANSI9

[ANSI1] ANSI/TIA/EIA-644-A, Electrical Characteristics of 10Low Voltage Differential Signaling (LVDS) Interface 11Circuits12

Clock and Control Module (CCM) Specification … Specification v1.0.pdfClock and Control Module...

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