1、 TIA/EIA INTERIM STANDARD Electrical Specification for the Portable Phone to Vehicle Interface TIA/EIA/IS-789-A 1 (Revision of TIA/EIA/IS-789) APRIL 2000 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Representing the telecommunications indushy in association with the Electronic Industries Aiance Elsctrrrn
2、r industrim Alliance NOTICE TMIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obta
3、ining with minimum delay the proper product for his particular need. Existence of such Standards and Publications shall not in any respect preclude any member or nonmember of TMIA fi-om manufacturing or selling products not conforming to such Standards and Publications, nor shall the existence of su
4、ch Standards and Publications preclude their voluntary use by those other than TIA/EIA members, whether the standard is to be used either domestically or internationally. Standards and Publications are adopted by TMIA in accordance with the American National Standards Institute (ANSI) patent policy.
5、 By such action, TMIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard or Publication. TMIA INTERIM STANDARDS TMIA Interim Standards contain information deemed to be of technical value to the industry, and are published at
6、 the request of the originating Committee without necessarily following the rigorous public review and resolution of comments which is a procedural part of the development of a TMIA Standard. TMIA Interim Standards should be reviewed on an annual basis by the formulating Committee and a decision mad
7、e on whether to proceed to develop a TMIA Standard on this subject. TMIA Interim Standards must be cancelled by the Committee and removed fi-om the TMIA Standards Catalog before the end of their third year of existence. Publication of this TMIA Interim Standard for trial use and comment has been app
8、roved by the Telecommunications Industry Association. Distribution of this TMIA Interim Standard for comment shall not continue beyond 36 months fi-om the date of publication. It is expected that following this 36 month period, this TMIA Interim Standard, revised as necessary, will be submitted to t
9、he American National Standards Institute for approval as an American National Standard. Suggestions for revision should be directed to: Standards Electro-magnetic compatibility (EMC) for European Digital Cellular Telecommunications System (GSM 900 and DCS 1800 MHz) Part 1 Mobile and portable radio a
10、nd ancillary equipment. Partl: Passenger cars and light commercial vehicles with nominal 12 V Road Vehicles - Electrical disturbance by conduction and coupling Ref. # Il/ /2/ /3/ /4/ Document Number ETS 300 342-1 IS0 7637-1 /5/ /6/ /7/ /8/ /9/ USCAR Standard for Automotive Electrical Connection Syst
11、ems Section 5, Standard Radiated Signal Measurement Procedure Connection Specification for the Portable Phone to Vehicle Interface Standard Cable Radio Frequency Flexible and Semi-rigid General Specification. (Industry Standard for RG58 and RG316 Coax Connections) Electromagnetic Susceptibility Meas
12、urement Procedures for Vehicle Components (Except Aircraft) And the related SAE J1113 Series of Documents: * Conducted Emissions: J1113I12, J1113142; Conducted Immunity: J1113-2, J1113-3, J1113I11; Electrostatic Discharge: J1113I13; Radiated Emissions: J1113I21, J1113141; Radiated Susceptibility: Jl
13、ll3I1, J1113-4, J1113I23, J1113-25. Available from The IDB Forum (http:/www.idbforum.org): Working document IDB-0002-01, ITS Data Bus Application Message Layer Lexicon, to be published as SAE J2366-7LX at a later date. Application Messages, to be published as SAE J2366-7F at a later date. Working do
14、cument IDB-0008-01, ITS Data Bus Communications 1101 PF-1, Rev-A TIAEIA 136-270-A TIAEIA IS-788A MIL-C-17, Rev -G SAE J1113 and related parts“ IDB-0002-01 IDB-0008-01 supply voltage - Electrical transients conducted along supply lines only. The Society of Automotive Engineers (SAE) 72366 ITS Data Bu
15、s (IDB) Protocol Series of Documents:* 72366-1 ITS Data Bus Physical Layer, 72366-2 ITS Data Bus Link Layer, 72366-4 ITS Data Bus Thin Transport Layer, 72366-7 ITS Data Bus Application Message Layer. Digital Cellular Telecommunications System (Phase 2+) ransmission planning aspects of the speech ser
16、vice in the GSM Public Land Mobile Network (PLMN) system IGSM 03.50 version 5.0.1 SAE J2366-* ETS 300 903 2 TINEINIS-789-A 1 1.2 Definition of Terms and Acronyms Term AAS AC ACC DC EMC ETS GND GSM IDB IGN-SNS IE Ioper IS0 ITS ITU LSPPOS, LSPNEG MICNEG MICPOS MUTE PAS PLMN Reserved RF RMS SAE SPL TIA
17、 USCAR VBAT Definition Automobile adaptation system Alternating current Accessory (position on vehicle ignition) Direct current Electromagnetic compatibility European Telecommunications Standard Electrical ground Global System for Mobile Communications ITS Data Bus Ignition Sense (Active High) Inter
18、face between the PAS and the AAS. Current consumed by the system while in any operational mode (including conversation namely, Power, Audio, Control, Data, Antenna, and System. In total 8 required pins, 4 optional pins, plus an RF coax are defined for this interface, IE. Description of System 7 8 Th
19、e entire system is comprised of two sub-systems as described in the following section s. 9 2.1.1 Vehicle Systems (AAS) 10 11 12 13 14 15 16 17 18 19 20 2.1.2 21 22 23 24 25 26 27 28 29 The vehicle sub-system (AAS, Automobile Adaptation System) is provided within the interior in which a standardized
20、connector is available to the occupant for connection to the portable phone system. Inside the vehicle (AAS) the following shall be provided: Battery Power (Fused) Ground Ignition Sense Signal Microphone Connection to vehicle audio system or speaker with power amplifier External Antenna Connection (
21、see section 2.2.1) Data Communications (see section 2.2.1) Phone Systems (PAS) The phone sub-system (PAS, Phone Adaptation System) is provided by the portable phone manufacturer (phone adapter module) and shall perform or provide the following: Phone Audio Output Phone Battery Charging Cable connect
22、ion to the standard interface Power conditioning for phone operation Audio Mute Signal (Call in Progress indication) RF power feed through (see section 2.2.1) Data Communications (see section 2.2.1) 4 9 10 11 System Classes Class 1 Class 2 Class 3 Class 4 TINEINIS-789-A 2.2 System Architecture Hands
23、free Data Exchange External Antenna Operation Operation Operation mas mas m6oax Notes Required Required Required IDB supported Required Required Not Required IDB supported Required Not Required Required IDB not supported Required Not Required Not Required IDB not supported Figure 1 System Architectu
24、re Overview Vehicle systems VEHICLE (AAS) VBAT / GND MICROPHONE (AUDIO IN) SPEAKER / AMPLIFIER EXT ANTENNA (see section 2.2.1) IGN-SNS SIGNAL PROCESS MUTE SIGNAL (PAS) / Phone !I I I I Portable Phone I CHARGE/ PWR CONDITION 2, I AUDIO CONDITIONING AUDIO OUTPUT cop RF CONNECTION 2, I (see section 2.2
25、.1) . PROCESS IGN-SNS MUTE SIGNAL DATA DATA I (see section 2.2.1) I L,d I (see section 2.2. i) L, IE Figure 1 illustrates an overview of the system architecture. Note: Functions contained within the solid boxes are mandatory to meet this standard. Functions shown in the dashed boxes are optional (se
26、e section 2.2.1 for configuration). 2.2.1 System Configuration Declaration Statement The following illustrates the valid arrangements, required for compliance to this specification, for the four system classes. It is required that the PAS and AAS be of the same system class for compliance to this sp
27、ecification. For Class 1 and Class 2 Systems, the functionality of Mute and Ignition Sense signals (see section 6.1) 1 may be implemented as IDB messages (reference /lo/ for details) rather than as discrete signals. 5 TINEINIS-789-A 1 3. 2 3 Figure 2 Power Interface (For Reference Only) AAS PAS Fl E
28、 I I I I I I 4 I n l o + PHONE 1 F, = 6, = Fuse Battery c, = I= E Power Condi ti on ng Interface Figure 2 illustrates the power interface between the AAS and the PAS. 6 TINEINIS-789-A Absolute DC-voltage range (continuous) (1 minute) 3.1 XB Electrical 0.0 v -14.0 V This signal originates in the vehi
29、cle and is used as a fused power supply for the interface, IE. Voltage levels are referenced to GND. Table 1 defines the electrical parameters of this signal. Table 1 VBAT Electrical Parameters Parameter Opcraiioiiai iipui I 9.0 v DC-voltage. Input DC- Continuous current Peak I - I - Quiescent I - C
30、ontact resistance Transients and surges I - 19.0 V +24.0 V 4.0 A 5.0 A 2.0 mA 20 mQ Notes (References) Operating voltage of vehicle battery. See 151. The device must be operational and meet the requirements of this standard within these limits. The requirements for 7 dit nominal), (and 36V nominal,
31、48V nominal, etc) systems are reserved for further study. (Typical nominal is 13.5V) No guarantee of performance is made for supply voltages exceeding the operational voltage levels, but which are within the absolute maximum range. Any supply voltage levels exceeding the absolute maximum levels may
32、cause permanent damage. Maximum continuous current (Temnerature ratinns as ner hl. Duty cycle of lo% and a duration of maximum 100 ms. (Temperature ratings as per 151). Maximum allowed leakage current consumption while in quiescent made. Over an operating range of as per ISI. As specified in I91 (si
33、milar to 121) Quiescent is defined as (a) When the portable phone is removed (i.e., non operational current when the portable phone is not present) or (b) when IGN-SNS is inactive and MUTE is inactive (i.e., the vehicle is powered off and there is no call in progress). 1 7 TINEINIS-789-A Parameter i
34、 3.2 GND Electrical limits Notes (Keerences) Min I Max 5 This signal originates in the vehicle and is used as the return signal. It is considered the chassis ground of the interface, IE. Table 2 defines the electrical parameters of this signal. Table 2 GND Electrical Parameters I Input I Continuous
35、I - I 4.0A I Maximum continuous current (At I temperature ratings as specified in I - Contact resistance Transients and surges I - 5.0 A 2.0 mA 20 mi2 151) Duty cycle of lo% and a duration of maximum 100 ms. (At temperature ratings as specified in 151) Maximum allowed leakage current consumption whi
36、le in quiescent mode. Over an operating range of as per 151. As specified in I91 (similar to 121) Quiescent is defined as (a) When the portable phone is removed (i.e., non operational current when the portable phone is not present) or (b) when IGN-SNS is inactive and MUTE is inactive (i.e., the vehi
37、cle is powered off and there is no call in progress). 1 8 TINEINIS-789-A 1 4. Audio (Microphone) Pins 2 Figure 3 Microphone Interface Path (For Reference Only) 3 7 8 9 10 11 AAS o= Al PAS /Phone IE VREG Shielding as I I Phone FQFrl ieeded) I Figure 3 illustrates the audio microphone interface betwee
38、n the AAS and the PAS. Al : IE : A2: VREG: Rs: Active microphone. Its gain is dependent on the estimated distance between bhmdmibemd the microphone and the internal vehicle acoustical environmental parameters. Interface between the AAS and the PAS. Phone adapter, which re-references and adjusts the
39、microphone signal to meet the required input level to the phone. Regulated voltage supplied by PAS to bias microphone in AAS. Pull up resistor in PAS used for biasing microphone in AAS. 9 TINEINIS-789-A 3 4.1 Microphone (MICPOS,MICNEG) Acoustical Table 3 Microphone Acoustical Parameters Iarameter In
40、stalled Microphone Sensitivity Distortion. Frequency response Limits Min. I Max. -26dBV (50mV RMS) Nominal. (Corresponds to typical phone system level of - 18dBmo) Max 3.0% achtic test source, as described below, when positioned in the vehicle under test at a typical talker mouth position and direct
41、ed forward, shall generate a nominal voltage level at the Znter$uce (IE) of -26 dBV (50 mV RMS). This is measured between MICPOS and MICNEG. including only the 1/3 octave bands from the center frequency of 315 Hz to the center hequency of 3.15kHz (overall bandwidth limit : 280 Hz to 3550 Hz) with en
42、ergy sufficient to generate 62 dB SPL Nom at a distance of 1 meter on axis from the source under anechoic conditions. The directional characteristics of the source should approximate those of a human speaker. This acoustic test source is intended to provide an acoustic level at the microphone equal
43、to that produced by an average talker in a quiet vehicle. The specified installed Microphone Sensitivity is typically obtained from amplified directional microphones with anechoically measured on-axis 1 KHz sensitivities of OdBV to -4dBV at 1 Pa (94dB-SPL), depending on microphone positioning and ai
44、ming. specified -26dBV (50 mV RMS) nominal microphone output level should produce a phone system level of - 18dBmo. It is recognized that practical system design limitations often dictate a reduction in the transmitted phone system level of up to 12dB below this. Distortion measured at 1004 Hz, as p
45、er /4/, +5dBV, (1.778VRMS) at 25“ C, VBAT = 9.0V, including acoustical elements. The hequency response shall be within the mask as specified in section 3.8.2.1 of /4/. It is recommended that the hequency response have a rising characteristic e.g. +4dB to +10dB I3400 relative to 3OOHz to improve inte
46、lligibility within the restricted audio transmission bandwidth in the presence of typical vehicle noise. enhanced performance for voice dialing and speech recognition svstems. are subiect to further studv. te%hkignal shall be band-limited pink noise ac%ve handset-equivalent system levels, the fr-dre
47、sponse limits, to provide Table 3 defines the acoustical parameters of the microphone interface. 10 TINEINIS-789-A Input impedance (Ri) Pull-up Resistor (Rs) i 4.2 Microphone (MICPOS,MICNEG) Electrical 900Q _ 1.0 kQ I 5% 2 Table 4 AAS Microphone Electrical Parameters 3 Measured in the frequency rang
48、e of I - I l.O kQ I 300 to 3400 Hz. I Output impedance 4 5 8 9 Table 4 defines the electrical parameters of the microphone interface, looking into the AAS. Table 5 PAS Microphone Electrical Parameters I DCComponent I 8.5V I 9.5V I Voltage supplied to microphone by phone adapter module through a resi
49、stor. Rs. Measured in the frequency range of 300 to 3400 Hz. The first amplification stage of PAS must be AC coupled. Rs is a pull-up resistor to VREG in the PAS. VREG AC Component Passband (Noise and ripple) M AC Component (Noise and ripple) -6OdBV ( 1 .OmVRMS) -45dBv (5.OmVRMS) Measured over the frequency range of 300Hz to 3400Hz. (Between MICPOS and MICNEG) (microphone disconnected). Measured over the frequency range of 1OHz to 1OOKHz. (Between MICPOS and MICNEG) microDhone disconnected). Table 5 defines the electrical parameters of the m
