philips SAA2503 MPEG2 audio decoder handbook
Contents
1. C s DID NND WS channel n sex SIL UU ve UU UU LT ee UU UU UL 0 31 0 31 channel 0 2 4 or 6 gt channel 1 3 5or 7 MGK397 Fig 4 Quad I2S bus channel format 1997 Jul 02 10 Philips Semiconductors MPEG2 audio decoder AUDIO OUTPUTS INTERFACING Also see Chapter Interfacing to the A V splitter Stereo output for DAC The output stereo down mixing signal is in 12S bus format and can be directly connected to a DAC The SDOO pin 57 provides the output for the serial audio data Furthermore SCKT pin 59 provides the 12S bus clock and WST pin 60 the 12S bus word select IEC 958 transmitter The format of the IEC 958 interface consists of a sequence of IEC 958 sub frames Each IEC 958 sub frame is normally used to carry one LPCM sample The IEC 958 sub frame may also be used to convey data words The non PCM encoded audio bitstreams to be transferred are formed into data bursts These bitstreams consist of a sequence of data words Each data burst contains a 64 bit burst_preamble followed by the burst_payload Table 3 Pinning of IEC 958 interface Objective specification SAA2503 The burst_preamble provides a sync_word information on the burst_payload and the bitstream number The interface may convey one or more bitstreams Each type of bitstream may impose a particular requirement for the repetition time2. 1997 Jul 02 13 Philips Semiconductors Objective specification MPEG2 audio decoder SAA2503 PACKAGE OUTLINE LQFP100 plastic low profile quad flat package 100 leads body 14 x 14 x 1 4 mm SOT407 1 detail X DIMENSIONS mm are the original dimensions UNIT 1 A2 Az 1 1 5 3 Note 1 Plastic or metal protrusions of 0 25 mm maximum per side are not included OUTLINE REFERENCES EUROPEAN VERSION JEDEC ElAJ PROJECTION SOT407 1 E 95 12 19 ISSUE DATE 1997 Jul 02 14 Philips Semiconductors MPEG2 audio decoder SOLDERING Introduction There is no soldering method that is ideal for all IC packages Wave soldering is often preferred when through hole and surface mounted components are mixed on one printed circuit board However wave soldering is not always suitable for surface mounted ICs or for printed circuits with high population densities In these situations reflow soldering is often used This text gives a very brief insight to a complex technology A more in depth account of soldering ICs can be found in our IC Package Databook order code 9398 652 90011 Reflow soldering Reflow soldering tec
3. Fig 2 Pin configuration 1997 Jul 02 7 Philips Semiconductors MPEG2 audio decoder FUNCTIONAL DESCRIPTION Operating modes The SAA2503 can operate in 2 modes Stand alone mode 4 In this mode modC 1 modB 0 and modA 0 the SAA2503 boots itself from the internal program ROM after power up and can start decoding when a decoding mode has been selected via the 12C bus Booting via the I2C bus mode 7 In this mode modC 1 modB 1 and modA 1 the SAA2503 starts executing an internal boot program that will receive 1536 bytes via the 12C bus and then write those to an on chip program RAM This mode allows the standard behaviour I O interfaces additional processing to be modified as specified in the stand alone mode Decoding modes The SAA2503 has the following decoding modes MPEG decoding 48 kHz DVD 44 1 kHz VCD IEC 958 LPCM MPEG decoding 48 kHz DVD 44 1 kHz VCD IEC 958 BITSTR e LPCM CD DA 44 1 kHz Table 1 Pinning of the 12S bus interface Objective specification SAA2503 e LPCM down sampling DVD 96 kHz 4 channel input 48 kHz 2 channel output e LPCM DVD 48 kHz 8 channel input 2 channel output System clock The preferred system clock to be applied to the EXTAL pin of the SAA2503 is 27 MHz if booted in mode 4 stand alone operation The internal PLL multiplies this clock by a factor of 3 to obtain an 81 MHz internal clock If using another external clock freq
4. NOTES 1997 Jul 02 19 Philips Semiconductors Argentina see South America Australia 34 Waterloo Road NORTH RYDE NSW 2113 Tel 61 2 9805 4455 Fax 61 2 9805 4466 Austria Computerstr 6 A 1101 WIEN P O Box 213 Tel 43 1 60 101 Fax 43 1 60 101 1210 Belarus Hotel Minsk Business Center Bld 3 r 1211 Volodarski Str 6 220050 MINSK Tel 375 172 200 733 Fax 375 172 200 773 Belgium see The Netherlands Brazil see South America Bulgaria Philips Bulgaria Ltd Energoproject 15th floor 51 James Bourchier Blvd 1407 SOFIA Tel 359 2 689 211 Fax 359 2 689 102 Canada PHILIPS SEMICONDUCTORS COMPONENTS Tel 1 800 234 7381 China Hong Kong 501 Hong Kong Industrial Technology Centre 72 Tat Chee Avenue Kowloon Tong HONG KONG Tel 852 2319 7888 Fax 852 2319 7700 Colombia see South America Czech Republic see Austria Denmark Prags Boulevard 80 PB 1919 DK 2300 COPENHAGEN S Tel 45 32 88 2636 Fax 45 31 57 0044 Finland Sinikalliontie 3 FIN 02630 ESPOO Tel 358 9 615800 Fax 358 9 61580920 France 4 Rue du Port aux Vins BP317 92156 SURESNES Cedex Tel 33 1 40 99 6161 Fax 33 1 40 99 6427 Germany HammerbrookstraBe 69 D 20097 HAMBURG Tel 49 40 23 53 60 Fax 49 40 23 536 300 Greece No 15 25th March Street GR 17778 TAVROS ATHENS Tel 30 1 4894 339 239 Fax 30 1 4814 240 Hungary see Austria India Philips INDIA Ltd Shivsagar Estate A Block Dr An
5. droplet of adhesive The adhesive can be applied by screen printing pin transfer or syringe dispensing The package can be soldered after the adhesive is cured Maximum permissible solder temperature is 260 C and maximum duration of package immersion in solder is 10 seconds if cooled to less than 150 C within 6 seconds Typical dwell time is 4 seconds at 250 C A mildly activated flux will eliminate the need for removal of corrosive residues in most applications Repairing soldered joints Fix the component by first soldering two diagonally opposite end leads Use only a low voltage soldering iron less than 24 V applied to the flat part of the lead Contact time must be limited to 10 seconds at up to 300 C When using a dedicated tool all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 C Philips Semiconductors Objective specification MPEG2 audio decoder SAA2503 DEFINITIONS Data sheet status Objective specification This data sheet contains target or goal specifications for product development Preliminary specification This data sheet contains preliminary data supplementary data may be published later Product specification This data sheet contains final product specifications Limiting values Limiting values given are in accordance with the Absolute Maximum Rating System IEC 134 Stress above one or more of the limiting values may cause permanent damag
6. monitor the MPEG decoding process When this flag no longer toggles there is an error When the SAA2503 operates in one ofthe LPCM modes however the flag produces either a 23 437 Hz fas 48 kHz or a 21 533 Hz fas 44 1 kHz signal 1997 Jul 02 11 3 MPEG decoding active and synchronised pin 77 MUTE when the SAA2503 operates in the MPEG decoding mode this flag indicates the state of the SAA2503 synchronized or not When this pin is at logic 1 the SAA2503 is out of sync when set to logic O the SAA2503 is synchronized It will not change state when the SAA2503 remains synchronized When the SAA2503 is operating in one of the LPCM modes the MUTE pin is set at logic 1 during initialization and logic O during processing 12C bus interface The 12C bus interface supports data rates of up to 400 kbits s For a description of the I2C bus see The PC bus and how to use it ordering number 9398 393 40011 For a description of the I C bus commands controlling the SAA2508 see Table 1 Philips Semiconductors MPEG2 audio decoder APPLICATION SCHEMATIC Objective specification SAA2503 RESET gt L14 POWER E tale HO PBO H1 PB1 H2 PB2 H3 PB3 H4 PB4 H5 PB5 H6 PB6 H7 PB7 HOA0 PB8 HOA1 PB9 HOA2 PB10 HR W PB11 HEN PB12 HOREQ PB13 HACK PB14 SAA2503 GPIOO GPIO1 GPIO2 GPIO3 I2CEN BUSY MUTE SDB 41 93 100 81 10 2
7. 0 29 14 36 63 88 JP41 o 0 96 78 84 51 52 45 43 53 47 48 49 46 jumper 50 58 17 23 28 15 37 62 87 44 4 54 0090 eoo IEC 958 OUT EBU DSCK OS1 DSI OSO 00 RESET JP42 jumper o o JP43 jumper MODE SETTINGS o o R137 JP44 jumper o o 10 ka JP45 jumper R139 12C BUS ADDRESS LC 10 kQ SETTINGS JP46 jumper o U11B JP Ol 1 SCL 3 Do MUTE SDA 0 2 12C BUS CONTROL 74HC04 L HEADER 3 MGK399 Fig 5 Application diagram continued in Fig 6 1997 Jul 02 12 Philips Semiconductors Objective specification MPEG2 audio decoder SAA2503 serial audio data from A V splitter JP HEADER 4 D A CLK 4 244 R C 47 KQ J2 A ENG p 10nF Vcc via OP AMP to gt FILTCL analog output LED y De BCK C S DATA VOR A 10uF EMP1 DEEMI E l47k0 UMA Ee EMP2 DEEM2 TDA1305 FILTCR 1 2 ATSB 7 MUTE MUSB Vref Vec 74HC04 DSMB O n c Vppo A a TESTI 100 47 uF O 7 TEST2 Vsso yr nF JP50 R141 T 1 2nF TI ko Vcc Vcc MGK400 de 74HC04 decoupling R143 CS EAT KO 100 nF DR L7 Voc BLM21A10 R110 5 u54 L cs SE 27 MHz OSC 100 nF Fig 6 Application diagram continued from Fig 5
8. 3 WARSZAWA Tel 48 22 612 2831 Fax 48 22 612 2327 Portugal see Spain Romania see Italy Russia Philips Russia Ul Usatcheva 35A 119048 MOSCOW Tel 7 095 755 6918 Fax 7 095 755 6919 Singapore Lorong 1 Toa Payoh SINGAPORE 1231 Tel 65 350 2538 Fax 65 251 6500 Slovakia see Austria Slovenia see Italy South Africa S A PHILIPS Pty Ltd 195 215 Main Road Martindale 2092 JOHANNESBURG P O Box 7430 Johannesburg 2000 Tel 27 11 470 5911 Fax 27 11 470 5494 South America Rua do Rocio 220 5th floor Suite 51 04552 903 S o Paulo SAO PAULO SP Brazil Tel 55 11 821 2333 Fax 55 11 829 1849 Spain Balmes 22 08007 BARCELONA Tel 34 3 301 6312 Fax 34 3 301 4107 Sweden Kottbygatan 7 Akalla S 16485 STOCKHOLM Tel 46 8 632 2000 Fax 46 8 632 2745 Switzerland Allmendstrasse 140 CH 8027 Z RICH Tel 41 1 488 2686 Fax 41 1 481 7730 Taiwan Philips Semiconductors 6F No 96 Chien Kuo N Rd Sec 1 TAIPEI Taiwan Tel 886 2 2134 2865 Fax 886 2 2134 2874 Thailand PHILIPS ELECTRONICS THAILAND Ltd 209 2 Sanpavuth Bangna Road Prakanong BANGKOK 10260 Tel 66 2 745 4090 Fax 66 2 398 0793 Turkey Talatpasa Cad No 5 80640 G LTEPE ISTANBUL Tel 90 212 279 2770 Fax 90 212 282 6707 Ukraine PHILIPS UKRAINE 4 Patrice Lumumba str Building B Floor 7 252042 KIEV Tel 380 44 264 2776 Fax 380 44 268 0461 United Kingdom Philips Semiconductors Ltd 276 Bath R
9. D 0 SAA2 DO INTEGRATED CIRCUITS DATA SHEET M PEG DIC Multichannel SAA2503 MPEG2 audio decoder Objective specification 1997 Jul 02 File under Integrated Circuits ICO1 Philips PHILIPS Semiconductors DH LI E Philips Semiconductors Objective specification MPEG2 audio decoder SAA2503 FEATURES Single chip MPEG2 multichannel audio decoder Decodes MPEG high quality audio MPEGI layer 2 44 1 kHz MPEG2 multichannel layer 2 48 kHz Supports pause frames Outputs 2 channels Quasi surround down mixing for Left and Right Dolby surround channel Lt and Rt Stereo down mixing for stereo reproduction Stereo signal selection Single channel down mixing Karaoke modes Linear PCM modes Down sampling from 96 to 48 kHz Pass 48 kHz signals Bitstream input interface 12S bus IEC 1937 formatted IEC 958 output interface IEC 1937 formatted e IEC 958 output simultaneously available while decoding MPEG2 e 2C bus control e Output flags for direct control Stand alone operation possible self booting No external DRAM or SRAM required e On chip PLL for internal clock generation e 13 5 or 27 MHz master clock 100 pins plastic LQFP package e 5 V power supply ORDERING INFORMATION MPEG WC Multichannel E US APPLICATIONS This IC is mainly intended for use in Digital Versatile Disc DVD players However it may also
10. be used in any application that is able to accept an MPEG2 audio bitstreams such as e Settop boxes e Multimedia PCs Digital television e Next generation audio equipment GENERAL DESCRIPTION The SAA2503 incorporates all necessary functions such as MPEG2 multichannel audio decoding plus down mixing MPEG1 layer 2 decoding Linear PCM LPCM processing all producing high quality audio Together with the serial audio interfaces and the IEC 958 transmitter this allows for the complete audio function of a DVD player in a single chip TYPE NUMBER PACKAGE VERSION SAA2503HT DESCRIPTION LQFP100 plastic low profile quad flat package 100 leads body 14 x 14 x 1 4 mm SOT407 1 1997 Jul 02 Philips Semiconductors MPEG2 audio decoder FUNCTIONAL UO DIAGRAM Objective specification SAA2503 HO to H7 HAO to HA2 HR W HEN HOREQ HACK PB14 GPIOO to GPIO3 x 12CEN BUSY MUTE ACI resrved 19 MODC MODB MODA RESET HA2 PC BUS HAO SERIAL pus INTERFACE INTERFACE elk HREQ lt SDB lt SCKR SAA2503 lt WSR SCKT SERIAL Wer AUDIO INTERFACE BD i SD SDOO SDO1 SDO2 IEC 958 TRANSMITTER DSCK OS1 DSI OSO reset interrupt MGK396 Fig 1 Functional I O diagram 1997 Jul 02 Philips Semiconductors Objective specifica
11. dio decoder SAA2503 SYMBOL PIN yo DESCRIPTION GPIO3 82 y o not used GPIO2 83 UO not used GPIO1 85 y o not used GNDQ4 87 GND ground 4 for some sections of internal logic n c 89 not connected ground 2 for some sections of internal logic not connected 93 isolated power supply 1 for some sections of the internal chip logic 94 not connected GND _ ground 3 for some sections of internal logic not connected VccA2 100 supply isolated power supply 2 for some sections of the internal chip logic 1997 Jul 02 6 Philips Semiconductors Objective specification MPEG2 audio decoder SAA2503 3 3 Sc EERE EE 222 229262292965666659l82a2619 s 8 Seles ele se 8 8 8 s e fs 8 2 8 el sl elfer n c 1 O 75 DR n c 2 74 n c GNDA1 3 73 n c n c A 72 n c n c 5 71 n c H7 PB7 6 70 DSCK OS1 H6 PB6 7 69 DSI OSO GNDH1 8 68 DSO HOA2 PB10 9 67 SDIO VecHi 10 66 SDI1 HOA1 PB9 11 65 WSR HR W PB11 12 64 GNDS3 HEN PB12 13 SAA2503 63 Vecas Vecai 14 62 GNDQ3 GNDQ1 15 61 SCKR HACK PB14 16 60 WST GNDH2 17 59 SCKT HOAO PB8 18 58 Vccs2 H5 PB5 19 57 SDOO VccH2 20 56 SDO1 H4 PB4 21 55 SDO2 H3 PB3 22 54 GNDS2 GNDH3 23 53 HREQ H2 PB2 24 52 HA2 H1 PB1 25 51 HAO amp a EQ I 8 15 S 8 13 8 S 5 3 8 S Y S S 8 S 3 S 8 8 o mn a Kei 5 O OX NN a a D JJ ec Ck m I 9 O gt a gt 6 ul O ra 2 gt a 2
12. e to the device These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied Exposure to limiting values for extended periods may affect device reliability Application information Where application information is given it is advisory and does not form part of the specification LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances devices or systems where malfunction of these products can reasonably be expected to result in personal injury Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale PURCHASE OF PHILIPS 12C COMPONENTS Purchase of Philips DC components conveys a license under the Philips 12C patent to use the components in the I C system provided the system conforms to the I2C specification defined by Philips This specification can be ordered using the code 9398 393 40011 1997 Jul 02 16 Philips Semiconductors Objective specification MPEG2 audio decoder SAA2503 NOTES 1997 Jul 02 17 Philips Semiconductors Objective specification MPEG2 audio decoder SAA2503 NOTES 1997 Jul 02 18 Philips Semiconductors Objective specification MPEG2 audio decoder SAA2503
13. for the data bursts that make up the bitstream The 16 bit data words of a data burst are placed in time slots 12 to 27 of an IEC 958 sub frame In the consumer application both odd and even IEC 958 sub frames CH1 and CH2 are simultaneously used to carry 32 bit data words 32 bit mode This allows the consumer IEC 958 to convey either 2 channel LPCM audio or a set of alternating data words but not both simultaneously For more information see IEC 1937 The IEC 958 interface is of the digital audio interface This conveys LPCM or encoded audio bitstreams according to IEC 1937 IEC 1937 using the network layer of IEC 958 IEC 958 The audio data will be accompanied by a validity bit channel status and user data sub code DESCRIPTION PIN NUMBER DIRECTION Audio Data Output output ACI Audio Clock Input note 1 31 input Note 1 The ACI clock is 256f or 512 or 384f INTERFACING WITH THE MICROCONTROLLER Flags The SAA2503 has 3 flags which after a hardware reset are all initialized to logic 1 1 12C bus communication disabled pin 80 I2CEN this flag is set to logic O when the SAA2503 is ready to accept messages via the I2C bus 2 Lifetest pin 79 BUSY when the SAA2503 operates in the MPEG decoding mode this flag toggles whenever the SAA2503 has detected a synchronization pattern The flag will then produce a 20 833 HZ fas 48 kHz and a 19 140 Hz fas 44 1 kHz signal It can be used to
14. gic O The serial data is received by the SAA2503 via the SDI1 pin pin 66 For more information on transporting MPEG2 bitstreams via IEC 958 see IEC 1937 Linear PCM LPCM 12S Bus Linear PCM samples are received in an 2S bus format Serial audio data is received via SDI1 pin 66 The 12S bus clock is received via SCKR pin 61 and the 12S bus word select is received via WSR pin 65 the 12S bus clock operates at 64fs N E CD ED ED ED ER ED RITO SDB I noon Ss MMM E 1 sampling period gt Fig 3 Quad I2S bus frame format Objective specification SAA2503 QUAD 2S BUS Quad I2S bus is the interface providing audio samples in LPCM with 4 times the sampling frequency The interface is an extension of the I2S bus where the Serial Data Begin SDB indicates the first 2 channels out of 8 channels The audio samples are transferred with MSB first where each sample occupies 32 bits filled with logic 0 MGK398 The SDB remains HIGH when only 2 channels LPCM or encode bitstreams in accordance with IEC 1937 are transferred Quad 2S bus is equal to 12S bus 1997 Jul 02 Philips Semiconductors Objective specification MPEG2 audio decoder SAA2503 Table 2 Allocation of LPCM channels on Quad l S bus fs 48 or 96 kHz NUMBER OF LPCM CHANNELS fs KHZ 48 N Q2 mute mute mute mute Q1 Q2 Q3 E Q1 Q2 3 4 OO Q3 COIN mute Mii mute
15. hniques are suitable for all LQFP packages Reflow soldering requires solder paste a suspension of fine solder particles flux and binding agent to be applied to the printed circuit board by screen printing stencilling or pressure syringe dispensing before package placement Several techniques exist for reflowing for example thermal conduction by heated belt Dwell times vary between 50 and 300 seconds depending on heating method Typical reflow temperatures range from 215 to 250 C Preheating is necessary to dry the paste and evaporate the binding agent Preheating duration 45 minutes at 45 C Wave soldering Wave soldering is not recommended for LQFP packages This is because of the likelihood of solder bridging due to closely spaced leads and the possibility of incomplete solder penetration in multi lead devices 1997 Jul 02 15 Objective specification SAA2503 If wave soldering cannot be avoided the following conditions must be observed e A double wave a turbulent wave with high upward pressure followed by a smooth laminar wave soldering technique should be used The footprint must be at an angle of 45 to the board direction and must incorporate solder thieves downstream and at the side corners Even with these conditions do not consider wave soldering LQFP packages LQFP48 SOT313 2 LQFP64 SOT314 2 or LQFP80 SOT315 1 During placement and before soldering the package must be fixed with a
16. ive specification SAA2503 SYMBOL DESCRIPTION VccP sm supply voltage for the Phase Locked Loop PLL EXTAL external clock crystal Input 12C bus serial clock isolated ground 1 for the SHI I O drivers 12C bus data and acknowledge hardware reset for the microcontroller mode select A mode select B mode select C EE SCH isolated power supply 1 for the SHI I O drivers 12C bus slave address 0 12C bus slave address 2 HREQ host request GNDS2 isolated ground 2 for the SHI I O drivers not used not used serial data output 0 SDO2 EE SA Vccs2 59 ERE isolated power supply 2 for the SHI I O drivers SCKT WST 60 transmit serial clock transmit word select receive serial clock ground 3 dedicated for the PLL isolated power supply 3 for some sections of the internal chip logic isolated ground 3 for the SHI I O drivers STE receive word select serial data input 1 SDI1 SDIO not used not used DSI OSO not used not used DSCK OS1 n c not connected not connected not connected not connected not used y o general purpose I O y o general purpose I O GND ground 1 for some sections of internal logic UO general purpose I O y o general purpose I O supply isolated power supply 1 for some sections of the internal chip logic 1997 Jul 02 5 Philips Semiconductors Objective specification MPEG2 au
17. nie Besant Rd Worli MUMBAI 400 018 Tel 91 22 4938 541 Fax 91 22 4938 722 Indonesia see Singapore Ireland Newstead Clonskeagh DUBLIN 14 Tel 353 1 7640 000 Fax 353 1 7640 200 Israel RAPAC Electronics 7 Kehilat Saloniki St PO Box 18053 TEL AVIV 61180 Tel 972 3 645 0444 Fax 972 3 649 1007 Italy PHILIPS SEMICONDUCTORS Piazza IV Novembre 3 20124 MILANO Tel 39 2 6752 2531 Fax 39 2 6752 2557 Japan Philips Bldg 13 37 Kohnan 2 chome Minato ku TOKYO 108 Tel 81 3 3740 5130 Fax 81 3 3740 5077 Korea Philips House 260 199 Itaewon dong Yongsan ku SEOUL Tel 82 2 709 1412 Fax 82 2 709 1415 Malaysia No 76 Jalan Universiti 46200 PETALING JAYA SELANGOR Tel 60 3 750 5214 Fax 60 3 757 4880 Mexico 5900 Gateway East Suite 200 EL PASO TEXAS 79905 Tel 9 5 800 234 7381 Middle East see Italy For all other countries apply to Philips Semiconductors Marketing amp Sales Communications a worldwide company Netherlands Postbus 90050 5600 PB EINDHOVEN Bldg VB Tel 31 40 27 82785 Fax 31 40 27 88399 New Zealand 2 Wagener Place C P O Box 1041 AUCKLAND Tel 64 9 849 4160 Fax 64 9 849 7811 Norway Box 1 Manglerud 0612 OSLO Tel 47 22 74 8000 Fax 47 22 74 8341 Philippines Philips Semiconductors Philippines Inc 106 Valero St Salcedo Village P O Box 2108 MCC MAKATI Metro MANILA Tel 63 2 816 6380 Fax 63 2 817 3474 Poland UI Lukiska 10 PL 04 12
18. oad Hayes MIDDLESEX UB3 5BX Tel 44 181 730 5000 Fax 44 181 754 8421 United States 811 East Arques Avenue SUNNYVALE CA 94088 3409 Tel 1 800 234 7381 Uruguay see South America Vietnam see Singapore Yugoslavia PHILIPS Trg N Pasica 5 v 11000 BEOGRAD Tel 381 11 625 344 Fax 381 11 635 777 Internet http www semiconductors philips com Building BE p P O Box 218 5600 MD EINDHOVEN The Netherlands Fax 31 40 27 24825 O Philips Electronics N V 1997 SCA54 All rights are reserved Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner The information presented in this document does not form part of any quotation or contract is believed to be accurate and reliable and may be changed without notice No liability will be accepted by the publisher for any consequence of its use Publication thereof does not convey nor imply any license under patent or other industrial or intellectual property rights Printed in The Netherlands 547027 1200 01 pp20 Philips Semiconductors Date of release 1997 Jul 02 Document order number 9397 750 01802 Lets make things better S PHILIPS
19. tion MPEG2 audio decoder SAA2503 PINNING SYMBOL PIN VO DESCRIPTION not connected not connected GND ground 1 for some sections of internal logic not connected H6 PB6 I O not used expat e ons ee HOA2 PB10 9 WO notused VccH1 10 supply isolated power supply 1 for some sections of the internal chip logic HR W PB11 12 lO not used 1 0 not used Vecai 14 supply isolated power supply 1 for the HI I O drivers GNDQ1 GND isolated ground 1 for the internal logic HACK PB14 16 lO not used HOAO PB8 18 I O not used VccH2 20 isolated power supply 2 for the HI I O drivers H4 PB4 21 not used H3 PB3 22 not used GNDH3 23 GND isolated ground 3 for the HI I O drivers H1 PB1 25 I O not used HOREQ PB13 27 I O not used 9 0 1 2 3 4 5 6 7 8 9 0 oo N VccH3 supply isolated power supply 3 for the HI I O drivers ADO Cl O digital audio data output audio clock input not connected A 2 Oo not connected not connected PLOCK O HIGH when PLL is phase locked Vcca2 supply isolated power supply 2 for some sections of the internal chip logic GNDQ2 GND isolated ground 2 for the internal logic PINIT PLL enable disable control GNDP GND ground dedicated for the PLL PCAP 4 2 3 3 3 3 3 3 3 3 3 3 3 5 o o PLL capacitor input 1997 Jul 02 4 Philips Semiconductors MPEG2 audio decoder Object
20. uency it is advisable to ensure that e The internal PLL is disabled during booting when folk ext gt 27 MHz e That 10 MHz lt folk ext x 3 81 MHz INTERFACING TO THE A V SPLITTER Serial audio interface The serial audio interface can be configured as an 2S bus interface and when required as Quad IS interface The signal received via the I S bus is an encoded audio bitstream in accordance with IEC 1937 or LPCM PINS DESCRIPTION PIN NUMBER DIRECTION SDIO high impedance 6 not used 7 SDI1 serial data 66 input output 57 output SDOO serial data SDO1 serial data 56 not used 55 not used SDO2 serial data SCKR 12S bus clock notes 1 and 2 61 input 65 input 76 input 59 input WSR word select receive serial data begin SCKT 12S bus clock notes 1 and 2 word select transmit Notes 1 SCKT is equal to SCKR when the I S bus format is the format of the input signal When Quad I S bus is used SCKT 4SCKR 2 The maximum allowed clock frequency for SCK is fek fox is the internal clock generated by the PLL of the SAA2503 1997 Jul 02 60 input Philips Semiconductors MPEG2 audio decoder MPEG2 bitstreams The MPEG2 audio bitstream is received via the I S bus in the same format as specified in IEC 1937 The MPEG2 audio bitstream consists of data bursts of 1 frame The data is formatted in 16 bit chunks The time period until the next frame is filled with lo
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philips SAA2503 MPEG2 audio decoder handbook