STV8203 ST Microelectronics, STV8203 Datasheet
STV8203
Available stocks
Related parts for STV8203
STV8203 Summary of contents
Page 1
... Set Top Box applications. Different transmission standardsare automaticallydetected and demodu- lated without user intervention. The recovered audio signals can be made available in analog form. More, the STV8203 integrates an audio ma- trix with a THRU mode when the stand-by. Very flexible applications are possible thanks to 2 ...
Page 2
... STV8203 SDIP42 PIN CONNECTIONS CAP5 SIF1 CAP6 SIF2 GND3 MOUT MIN CAP8 LIL1 LIR1 GND4 LIL2 LIR2 CAP2 CAP1 AOL1 AOR1 CAP4 AOL2 AOR2 AV TQFP44 PIN CONNECTIONS 12 MOUT 13 MIN 14 CAP8 15 LIL1 16 LIR1 17 GND4 LIL2 18 LIR2 19 20 CAP2 21 CAP1 22 AOL1 2/ GND2 ...
Page 3
... Crystal Oscillator Output Analog Crystal Oscillator Input Input To be connected to ground 2 Bi-directional I C Serial Data 2 Input I C Serial Clock - Not Connected - Not Connected Analog Decoupling for Digital 3V (regulator output) Analog Base Drive for External Regulator Transistor Power 5V Supply Power Digital Ground STV8203 3/31 ...
Page 4
... STV8203 BLOCK DIAGRAM SIF1 ANALOG AGC SWITCH SIF2 CRYSTAL XTAL OSCILLATOR DV POWER SUPPLY DD5 REGULATORS AV CC STV8203 * See Demodulator Core Block Diagram DEMODULATOR CORE BLOCK DIAGRAM Sub ADC FM IN BAND DISCRIMINATOR PASS LEVEL * ESTIMATOR RECOGNITION FM BAND DISCRIMINATOR PASS NICAM QPSK AND ...
Page 5
... RMS ically added to the DAC output. In that case, the resistor shown the ApplicationDia- gram (between Pin 8 and Pin 21) must be replace by a short circuit to avoid clipping. L1/R1 2 MUTE S1 L1, R1, (L1 + R1)/2 SELECTOR S2 L2/R2 MUTE 2 STV8203 . RMS supply pin CC AO1(SCART1) MOUT AO2(SCART2) 5/31 ...
Page 6
... D/K FM/NICAM 6.5 D/ carriers A2* 6.5 D/ carriers 6.5 FM/NICAM 6 mono 6.0 L NICAM 6.5 (1) M/N FM mono 4.5 (2) Notes : 1. STV8203 performs only limited AM demodulation. Report to Application Note only, instead 6/31 FM Deviation (kHz) Carrier 2 Deemphasis (kHz) Nom. Max. Over 5.850 J17 5.742 5.850 27 50 ...
Page 7
... USING STV8203 1 - Hardware 1.a - Power Supplies (see Figure 2) The IC is using two main power supplies : - DV supplies all the digital part V DD5 This power supply can be switched-off in stand- by mode supplies the audio matrixpart : then the output voltage swing on output pins can reach 2V ...
Page 8
... STV8203 USING STV8203 (continued) Figure 3 : Optimized Program Mode IF1 INPUT AGC ADC SWITCH IF2 LEVEL PRE-LINE-IN DETECTOR DCO COARSE AGCC AGCS AO-STAT0 AO-STAT1 AO-STAT2 AUTO STAT CTL STANDARD AO-CONTROL AO-TIMEOUT DCO COARSE Figure 4 : Advanced Operation Mode IF1 INPUT AGC ADC SWITCH ...
Page 9
... USING STV8203 (continued Example of Applications 3.a - Very Low Cost TV Application Figure 5 TUNER 1 QSS I.F. AM DEMODULATOR 3.b - High-End TV Application Figure Control 2 TUNER 1 MULTISTANDARD QSS I.F. SOUND PROCESSOR TUNER 2 STV8203 QSS I.F. AM DEMODULATOR SCART1 3 Application in PC Figure 7 TUNER 1 QSS I.F. TUNER 2 QSS I.F. AM DEMODULATOR I C Control 2 MULTISTANDARD AUDIO SOUND ...
Page 10
... STV8203 ABSOLUTE MAXIMUM RATINGS Symbol AV Analog Supply Voltage DD5 DV Digital Supply Voltage DD5 AV Scart Interface Supply Voltage CC P Power Total Dissipation tot T Operating Temperature oper T Storage Temperature stg THERMAL DATA Symbol R Junction to Pins Thermal Resistance th (j-p) RECOMMENDED OPERATING CONDITIONS Symbol AV Analog V DD5 ...
Page 11
... RMS All audio output except Mono output Mono output Preline unweighted 20Hz-15kHz OUT RMS 2V @ 1kHz RMS Analog Switch DIGITAL DAC STV8203 Analog STV8203 Switch AOL1 AOR1 or 2 STV8203 Min. Typ. Max. Unit -1 RMS 72 dB 0.07 % ...
Page 12
... STV8203 PROGRAMMING THE DEVICE Address and Protocol Write SUB-ADDRESS Read SUB-ADDRESS S = Start Acknowledge Stop acknowledge. Sub-address is the register address pointer ; this value auto-increments for both write and read List of Registers Registers not controlled by AUTOSTANDARD, except bits marked ”*” which are controlled Addr ...
Page 13
... FIR1 coefficient 1 FIR1 coefficient 2 FIR1 coefficient 3 FIR1 coefficient 4 FIR1 coefficient 5 FIR1 coefficient 6 FIR1 coefficient Channel 1 DCO Coarse Frequency Channel 1 DCO Fine Frequency (8lsb’s) 0 Coarse A1 Sign A1 0 dco1 gain STV8203 bit 2 bit 1 bit 0 Fine A2 B2 plf_B Fine 13/31 ...
Page 14
... STV8203 PROGRAMMING THE DEVICE (continued Register Description 3.1 - Registers Not Controlled By Autostandard (except some mentioned bits) PRE-FM (Prescale FM Level) Address : 02 Type : R/W Reset : 0001 1101 bit 7 bit 6 bit PRESCALE : 00000 0dB 01100 +12dB 10100 -12dB (step size = 1dB, range = 12dB in 2’s complement) Sets the reference level for an FM signal ...
Page 15
... Zweiton dual mono 10 11 Zweiton stereo X not used Nicam mono Nicam dual mono 10 11 Nicam stereo X bit 4 bit 3 bit LEVEL LEVEL 2 STV8203 bit 1 bit 0 SWD Left Right DSL DSR N1 N1 ...
Page 16
... STV8203 PROGRAMMING THE DEVICE (continued) PRE-LINE-IN (IF Input Selection and Audio Matrix Gain Control) Address : 07 Type : R/W Reset : 0000 1000 bit 7 bit 6 IF SWITCH AGC SWITCH OFF IF SWITCH : IF Input Switch controls the IF input selection (0 = IF1). AGC SWITCH OFF : can be used to switch-off the AGC amplifier.. ...
Page 17
... ECT= 64ms). bit 4 bit 3 bit 2 ECT MAE MAE BER Muting Threshold bit 4 bit 3 bit 2 ERROR STV8203 bit 1 bit 112 1 in 224 112 bit 1 bit 0 17/31 ...
Page 18
... STV8203 PROGRAMMING THE DEVICE (continued) AO-STAT0 (AUTOSTANDARD Status 0) Address : 0B Type : R bit 7 bit 6 bit 5 STD-DET SID1 SID0 STD-DET : Standard Detection : standard detected 1 = indicates that an expected standard has been identified. SID [1:0] : Standard Identification of the demodulator input indicate the standard which has been identified : ...
Page 19
... X1XX FM selected during additional coding options 0XXX Nicam different to FM mono 1XXX Nicam mono(M1) or stereo = FM mono N-MUTE : NICAM Mute indicates that the NICAM decoder is muted (it may be unmuted by AO-CONTROL bit 5). bit 4 bit 3 bit 2 NICAM CBI Nicam Signal Description STV8203 bit 1 bit 0 N-MUTE 19/31 ...
Page 20
... NICAM control bit (reserve sound switch) if required. This bit is transmitted by the broadcaster to indicate that the analogue sound carrier is a backup of the NICAM signal; this is usually the case. If the NICAM signal fails, the STV8203 will automatically switch to backup sound if the received bit was set this bit was set to 0 and bit 4 set to 0, the decoder will stay switched to analogue sound ...
Page 21
... AGC-CST : AGC time constant between each step of 1.25dB. For a 27MHz XTAL => 1.21ms 2.43ms 4.85ms 9.7ms. The adjustment is a compromise between settling time and noise immunity. bit 4 bit 3 bit 2 THRESH-ST bit 4 bit 3 bit 2 AGC-REF Clipping Ratio STV8203 bit 1 bit 0 bit 1 bit 0 AGC-CST 21/31 ...
Page 22
... SMALL When the AGC is in automatic mode (agc_cmd=0), bit 0 indicates if the input signal is too small and bit 1 if the AGC is too big. These bits could be used when setting the input level to the STV8203. IAGCR (Internal AGC Reference for QPSK) Address ...
Page 23
... Normal 011 Wide 110 Normal 111 Wide bit 4 bit 3 bit 2 CLOCK GENERATOR COARSE FREQUENCY (INT: integer part) (REM: fractional remainder) STV8203 bit 1 bit 0 bit 1 bit 0 bit 1 bit 0 CH2 FM/QPSK FM Normal FM Wide QPSK System B/G/L QPSK System B/G/L QPSK System I QPSK System I bit 1 ...
Page 24
... STV8203 PROGRAMMING THE DEVICE (continued) CRF2 - CRF1 (FM/QPSK PLL Demodulator Offset) Address : 20-3D Type : R/W Reset : 0000 0000 bit 7 bit 6 bit 5 CHANNEL 2 or CHANNEL 1 CARRIER RECOVERY FREQUENCY This register provides access to the instantaneousfrequency of the PLL (2’s complement). If written to, it will preset the DCO frequency; if read it provides the instantaneousfrequencyoffset of the PLL’s and could be used for an AFC function ...
Page 25
... CHANNEL 2 or CHANEL 1 DCO COARSE FREQUENCY STV8203 bit 1 bit 0 System L/L’ AM/NICAM CH2 CH1 CH2 - ...
Page 26
... STV8203 PROGRAMMING THE DEVICE (continued) FIFQ2 - FIFQ1 (DCO Fine Frequency) Address : 2C-3A Type : R/W Reset : 1100 0100 for FIFQ2 - 1100 0111 for FIFQ1 bit 7 bit 6 bit 5 CHANNEL 2 or CHANNEL 1 DCO FINE FREQUENCY (8LSB’s) The DCO’s, which are set to the carrier frequencyto be demodulated,are adjusted in two parts as follows : ...
Page 27
... Programme the PLL (FM/QPSK carrier recovery) loop filter integral coefficient [2:0] bit 4 bit 3 bit 2 DCO GAIN 000 001 010 011 100 101 110 111 000 001 010 011 100 101 11X STV8203 bit 1 bit Value 0 1 1/2 1/4 1/8 1/16 1/32 Not used Value 0 1/4 1/8 1/16 1/32 1/64 Not used ...
Page 28
... STV8203 PROGRAMMING THE DEVICE (continued) SCOEFF (Symbol Tracking Loop Filter Coefficients) Address : 2F Type : R/W Reset : 0001 1100 bit 7 bit 6 bit 5 DMX-OF 0 DMX-OF : Symbol tracking control : 0 = QPSK FM. In QPSK mode, the symbol tracking loop is closed. PLF_A : A coefficient (proportional) Programme the symbol tracking loop filter proportional coefficient A : ...
Page 29
... C17 10 F AOR1 C18 1nF 18 CAP4 NC 25 C19 AOL2 NC C20 AOR2 RESET (*) 21 AV CAP7 22 CC STV8203 C26 220nF Q1 BC557B C4 10nF 2 SCL 3 SDA 5V 39k C10 22pF R3 XTAL 22k (24.712MHz to 27MHz C12 22pF R1 220k C21 100nF 5V C22 10 F C25 ...
Page 30
... STV8203 PACKAGE MECHANICAL DATA 42 PINS - PLASTIC SHRINK DIP Millimeters Dimensions Min. Typ 0.51 A2 3.05 3.81 B 0.36 0.46 B1 0.76 1.02 c 0.23 0.25 D 37.85 38.10 E 15.24 E1 12.70 13.72 e 1.778 e1 15. 2.54 3.30 30/ SDIP42 Max. Min. 5.08 0.020 4.57 0.120 0.56 0.0142 1.14 0.030 0.38 0.0090 38.35 1.490 16.00 0.60 14.48 0.50 18.54 1.52 3.56 0. .015 0,38 Gage Plane e3 e2 Inches Typ. ...
Page 31
... Max. Min. 1.60 0.15 0.002 1.45 0.053 0.40 0.012 0.20 0.004 0.75 0.018 (Min.), 7 (Max system, is granted provided that the system conforms to http://www.st.com STV8203 A A2 Inches Typ. Max. 0.063 0.006 0.055 0.057 0.015 0.016 0.008 0.472 0.394 0.315 0.031 0.472 0.394 0.315 0.024 ...