SAA6588, Elektronika i elektryka, Serwisówki
[ Pobierz całość w formacie PDF ]
INTEGRATED CIRCUITS DATA SHEET SAA6588 RDS/RBDS pre-processor Product specification File under Integrated Circuits, IC01 1997 Sep 01 Philips Semiconductors Product specification RDS/RBDS pre-processor SAA6588 FEATURES · Integrated switched capacitor filters · Demodulation of the European Radio Data System (RDS) or the USA Radio Broadcast Data System (RBDS) signal · RDS and RBDS block detection · Error detection and correction The RDS/RBDS pre-processor is a CMOS device that integrates all RDS/RBDS relevant functions in one chip. The IC contains filtering and demodulation of the RDS/RBDS signal, symbol decoding, block synchronization, error detection, error correction and additional detectors for multi-path, signal quality and audio signal pauses. The pre-processed RDS/RBDS information is available via the I 2 C-bus. · Fast block synchronization · Synchronization control (flywheel) · Mode control for RDS/RBDS processing · Different RDS/RBDS block information output modes (e.g. A-block output mode) Fast I 2 C-bus interface · The RDS/RBDS pre-processor replaces a number of ICs and peripheral components used nowadays in car radio concepts with RDS or RBDS features. The integration of the relevant RDS/RBDS data processing functions provides, in an economic manner, high performance of RDS/RBDS processing and reduces the real-time requirements for the main radio microcontroller considerably. In addition it simplifies the development of the RDS specific software for the main controller of the radio set. · Multi-path detector · Signal quality detector with sensitivity adjustment · Pause detector with pause level and time adjustment · Alternatively oscillator frequency: n ´ 4.332 MHz (n = 1 to 4) · UART compatible with 17.328 MHz (n = 4) · CMOS device · Single supply voltage · Extended temperature range ( - 40 to +85 ° C). Compared with standard radio systems, RDS/RBDS controlled radio systems additionally require an RDS/RBDS demodulator with a 57 kHz band-pass filter, information about the current reception situation (reception quality, multi-path disturbance etc.), and additional microcontroller power for RDS/RBDS data processing, decoding and radio control. GENERAL DESCRIPTION Today most FM radio stations in Europe and meanwhile also many FM/AM radio broadcasting stations in the USA transmit the inaudible European RDS (Radio Data System) or the USA RBDS (Radio Broadcast Data System) informations respectively. Likewise nowadays receivers, most car radios and also some home and portable radios on the market include at least some of the RDS features. The RDS/RBDS system offers a large range of applications by its many functions to be implemented. For car radios the most important are: · The new RDS/RBDS pre-processor includes all these specific functions and meets all requirements of a high end RDS/RBDS radio. Moreover the timing requirements of the set controller, regarding RDS/RBDS data processing are reduced due to the integration of decoder functions, so that the development of radio control software can be concentrated specifically on radio set features. Program Service (PS) name · Traffic Program (TP) identification · Traffic Announcement (TA) signal · Alternative Frequency (AF) list · Program Identification (PI) · Enhanced Other Networks (EON) information. 1997 Sep 01 2 Philips Semiconductors Product specification RDS/RBDS pre-processor SAA6588 QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT V DDA analog supply voltage 4.5 5.0 5.5 V V DDD digital supply voltage 4.5 5.0 5.5 V I DD(tot) total supply current - 14.0 - mA V i(MPX) RDS input sensitivity at pin MPX 1 - - mV D G SQ step size for signal quality input gain - 0.6 - dB CR GSQ control range for signal quality input gain - 18.6 - dB t PON(min) minimum time for pause adjustable in 4 steps 20.2 - 161.7 ms f i(xtal) crystal input frequency n = 1 - 4.332 - MHz n=2 - 8.664 - MHz n=3 - 12.996 - MHz n=4 - 17.328 - MHz ORDERING INFORMATION TYPE NUMBER PACKAGE NAME DESCRIPTION VERSION SAA6588 DIP20 plastic dual in-line package; 20 leads (300 mil) SOT146-1 SAA6588T SO20 plastic small outline package; 20 leads; body width 7.5 mm SOT163-1 1997 Sep 01 3 560 pF + 5 V C9 100 nF C10 SCOUT CIN V DDD 18 19 7 multiplex input C1 330 pF MPX 16 57 kHz 8th ORDER BAND-PASS CLOCKED COMPARATOR RDS/RDBS DEMODULATOR RDS/RDBS DECODER 8 DAVN data available C2 0.47 m F audio inputs C3 0.47 m F 11 2 PSWN MPTH pause output multi-path output 10 k W R2 SAA6588 10 k R3 W AFIN 13 PAUSE DETECTOR MULTI-PATH DETECTOR SIGNAL QUALITY DETECTOR 4 INTERFACE REGISTER 5 C11 4 level input LVIN 20 2.2 nF V DDA POWER SUPPLY AND RESET 9 SDA 14 TEST CONTROL OSCILLATOR AND CLOCK I 2 C-BUS SLAVE TRANSCEIVER I 2 C-BUS + 5 V 10 SCL C8 100 nF 15 17 3 1 5 4 6 12 V SSA V ref TCON MRO OSCI OSCO V SSD MAD C7 2.2 R4 R1 m F C6 Q1 1 k W 470 k 100 nF W n ´ 4.332 MHz n = 1 to 4 MGK535 C4 47 pF C5 82 pF Fig.1 Block diagram. Philips Semiconductors Product specification RDS/RBDS pre-processor SAA6588 PINNING SYMBOL PIN DESCRIPTION SYMBOL PIN DESCRIPTION MRO 1 multi-path rectifier output PSWN 11 pause switch output (active LOW) MPTH 2 multi-path detector output MAD 12 slave address (LSB) input TCON 3 test control input pin AFIN 13 audio signal input OSCO 4 oscillator output V DDA 14 analog supply voltage (5 V) OSCI 5 oscillator input V SSA 15 analog ground (0 V) V SSD 6 digital ground (0 V) MPX 16 multiplex input signal V DDD 7 digital supply voltage (5 V) V ref 17 reference voltage output DAVN 8 data available output (active LOW) SCOUT 18 band-pass filter output SDA 9 I 2 C-bus serial data I/O CIN 19 comparator input SCL 10 I 2 C-bus serial clock input LVIN 20 level input handbook, halfpage MRO 1 20 LVIN handbook, halfpage MRO 1 20 LVIN MPTH 2 19 CIN MPTH 2 19 CIN TCON 3 18 SCOUT TCON 3 18 SCOUT OSCO 4 17 V ref OSCO 4 17 V ref OSCI 5 16 MPX SAA6588T OSCI 5 16 MPX V SSD 6 15 V SSA SAA6588 V SSD V DDD 6 15 V SSA V DDA V DDD 7 14 V DDA 7 14 DAVN 8 13 AFIN DAVN 8 13 AFIN SDA 9 12 MAD SDA 9 12 MAD SCL 10 11 PSWN SCL 10 11 PSWN MGK534 MGK533 Fig.2 Pin configuration (DIP20). Fig.3 Pin configuration (SO20). 1997 Sep 01 5 [ Pobierz całość w formacie PDF ] |