saa5250 NXP Semiconductors, saa5250 Datasheet
saa5250
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saa5250 Summary of contents
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... DATA SHEET SAA5250 Interface for data acquisition and control (for multi-standard teletext systems) Product specification File under Integrated Circuits, IC02 INTEGRATED CIRCUITS January 1987 ...
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... GENERAL DESCRIPTION The SAA5250 is a CMOS Interface for Data Acquisition and Control (CIDAC) designed for use in conjunction with the Video Input Processor (SAA5230 multi-standard teletext decoder. The device retrieves data from a user selected channel (channel demultiplexer), as well as providing control signals and consecutive addressing space necessary to drive bytes buffer memory ...
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... Philips Semiconductors Interface for data acquisition and control (for multi-standard teletext systems) k, full pagewidth January 1987 3 Product specification SAA5250 ...
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... DB7 A2 31 DB6 10 A1 DB5 11 SAA5250 DB4 D7 DB3 DB2 DB1 D4 DB0 ALE MGH074 Fig.2 Pinning diagram. 4 Product specification SAA5250 ...
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... CIDAC registers and the CPU ALE 17 Demultiplexing input signal for the CPU data bus CE 18 Chip enable input for the SAA5250 WR 19 Write command input (when LOW ground ...
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... write register write register write command register R6 (initialization command write register read status 0 1 read data register 1 0 test (not used test (not used) 6 Product specification SAA5250 6801/6805 TIMING R/W ...
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... Fig.3 Five prefixes. 7 Product specification SAA5250 R02 TO R00 USED PREFIXES 000 = DIDON long 001 = DIDON medium 010 = DIDON short 011 = not used 100 = U.K. teletext 101 = NABTS 110 = without prefix 111 = without prefix format CI ...
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... If R16 = 1; then the format is determined by the contents of the R3 register. The bits R13 to R10 represent the first channel number to be checked in the prefix. In U.K. teletext mode only 3 bits are required, so R13 = X. January 1987 R13 TO R10 (1) CHANNEL NUMBERS (FIRST DIGIT) first digit hexadecimal value 8 Product specification SAA5250 ...
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... R23 TO R20 channel number, second digit (hexadecimal value, second digit 9 Product specification SAA5250 LIST 3 LIST ...
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... Note data clock acquisition frequency. January 1987 R56 TO R50 SYNCHRONIZATION DELAY 7-bit sync delay, giving a maximum 7 6 delay s/F (Hz the positive or negative edge. DVAL Product specification SAA5250 s/F (Hz) ...
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... The FIFO memory provides the memory interface with the following: 11-bit address bus (A10 to A0) 8-bit data bus (D7 to D0) two control signals, memory select (MS) and write enable (WE) January 1987 DB1 = 1, data not present in the read data register 11 Product specification SAA5250 DB0 = 0 memory not full ...
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... Hamming correction (see Tables 13 and 14) The Hamming correction provides (see section ‘Prefix processing’): hexadecimal value of the Hamming code accept/reject code signal parity information January 1987 DB1 = 0 data available 12 Product specification SAA5250 DB0 = 0 memory not full ...
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... Product specification SAA5250 ...
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... error error error error error error error multiple errors Product specification SAA5250 INFORMATION accepted corrected accepted corrected accepted corrected accepted corrected accepted rejected ...
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... DIDON long (see Fig.4) In this mode, the continuity index, format and data bytes are written into the FIFO memory. (In fast mode, information can be written into the FIFO memory only after a page detection.) January 1987 15 Product specification SAA5250 ...
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... FIFO memory only after a flag detection.) January 1987 CI3 CI2 CI3 CI2 PS3 PS2 16 Product specification SAA5250 D1 D0 CI1 CI0 CI1 CI0 D1 D0 PS1 PS0 ...
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... MEMORY DURING SLOW MODE CI, F and and D CI, PS and D MRAG and D all bytes of the data packet following the framing code are written into the FIFO memory 17 Product specification SAA5250 D1 D0 RW1 RW0 BYTES STORED IN FIFO MEMORY DURING FAST MODE (1) (1) (1) ...
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... Philips Semiconductors Interface for data acquisition and control (for multi-standard teletext systems) January 1987 Fig.4 DIDON (long) acquisition flow chart. 18 Product specification SAA5250 ...
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... INITIALIZE CIDAC LOAD FORMAT COUNTER WITH EXPLICIT VALUE FAST 1 PAGE IN PROGRESS 0 1 START OF DECREMENT FORMAT COUNTER. WRITE DATA BYTES INTO FIFO Fig.5 DIDON (medium) acquisition flow chart. 19 Product specification SAA5250 FRAMING 0 CODE DETECT O. O.K. 1 FORMAT 1 COUNTER = 0 0 SLOW/FAST ...
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... PAGE IN 1 PROGRESS 0 FORMAT COUNTER = 0 0 START WRITE FORMAT INTO FIFO DECREMENT FORMAT COUNTER. WRITE DATA BYTES INTO FIFO Fig.6 DIDON (short) acquisition flow chart. 20 Product specification SAA5250 INITIALIZE CIDAC FRAMING 0 CODE DETECT O.K. 1 SLOW/FAST MODE SLOW FORMAT 1 COUNTER = 0 0 ...
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... SYNCHRONIZING PACKET 1 SET DATA GROUP IN PROGRESS FLAG WRITE CI BYTE INTO FIFO WRITE PS BYTE INTO FIFO COUNTER = 0 DECREMENT FORMAT COUNTER. WRITE DATA BYTES INTO FIFO Fig.7 NABTS acquisition flow chart. 21 Product specification SAA5250 O. O. O.K. 1 MODE SLOW FORMAT ...
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... CODE DETECT SLOW/FAST 1 PAGE IN 0 ROW 0 WRITE ROW NUMBER INTO FIFO LOAD FORMAT COUNTER WITH IMPLICIT FORMAT COUNTER = 0 DECREMENT FORMAT COUNTER. WRITE DATA BYTES INTO FIFO Fig.8 U.K. teletext acquisition flow chart. 22 Product specification SAA5250 0 FRAMING 1 0 MAG O.K. 1 MODE SLOW FORMAT MGH081 ...
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... WRITE DATA BYTES INTO FIFO MGH080 Fig.9 Without prefix acquisition chart CBI D = clamping diodes CBI = clamping pulse, the pulse width is given by the R7 register Fig.10 SD and DCK input circuitry. 23 Product specification SAA5250 clock input to data acquisition circuit data input to data acquisition circuit MGH076 ...
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... SYMBOL tot T 0 amb T 20 stg SYMBOL MIN. V 4 Product specification SAA5250 MIN. MAX. UNIT 6 0 400 125 C TYP. MAX. UNIT 5 0 0 7,5 pF ...
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... Input leakage current V Input capacitance External coupling capacitor January 1987 CONDITIONS SYMBOL MIN. V 2,0 I(p- text V 2 2,0 I(p- ext 25 Product specification SAA5250 TYP. MAX. UNIT V 200 0 ...
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... WEH t 10 MSL t 10 MSH DWL t 0 DWH DCK WEW t 2 DCK MSW 26 Product specification SAA5250 = MIN. TYP. MAX. 130 100 120 10 3 DCK 110 UNIT ...
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... DCK is 2 DCK period irrelevant. January 1987 CONDITIONS SYMBOL t 55 DCKL t 55 DCKH t 0 SSD t 30 HSD t 50 SVALI t 50 HVALI t 0 WCBB t X WVAL t 0 DVAL 27 Product specification SAA5250 MIN. TYP. MAX 127 UNIT DCK DCK DCK ...
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... WRITE CYCLE ALE t AHRD WR t AHRD RD CS BUS Fig.11 Timing diagram for microcontroller interface (Intel). January 1987 LHLL ALRD t AHL t ASL t RD ADDRESS LHLL ALRD t AHL t ASL t DW ADDRESS 28 Product specification SAA5250 OUT MGH087 ...
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... Philips Semiconductors Interface for data acquisition and control (for multi-standard teletext systems) January 1987 29 Product specification SAA5250 ...
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... Philips Semiconductors Interface for data acquisition and control (for multi-standard teletext systems) handbook, full pagewidth January 1987 30 Product specification SAA5250 ...
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... VAL OUT t WCBB CBB January 1987 t DCKL t SSD t SVALI Fig.14 Timing diagram for demodulator interface. CLOCK SYNCHRONIZATION FRAMING BITS CODE t DVAL Fig.15 Timing diagram for all other I/O signals. 31 Product specification SAA5250 t DCKH t HSD t HVALI MGH079 PREFIX AND DATA BYTES t WVAL MGH078 ...
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... scale (1) ( 0.53 0.36 52.50 14.1 2.54 0.38 0.23 51.50 13.7 0.021 0.014 2.067 0.56 0.10 0.015 0.009 2.028 0.54 REFERENCES JEDEC EIAJ MO-015AJ 32 Product specification SAA5250 3.60 15.80 17.42 15.24 0.254 3.05 15.24 15.90 0.14 0.62 0.69 0.60 0.01 0.12 0.60 0.63 EUROPEAN ISSUE DATE PROJECTION SOT129-1 ...
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... scale (1) ( 0.42 0.22 15.6 7.6 12.3 0.762 0.30 0.14 15.2 7.5 11.8 0.0087 0.61 0.30 0.48 0.03 0.0055 0.60 0.29 0.46 REFERENCES JEDEC EIAJ 33 Product specification SAA5250 detail 1.7 1.15 0.2 0.1 0.1 2.25 1.5 1.05 0.067 0.045 0.008 0.004 0.004 0.089 0.059 0.041 EUROPEAN ISSUE DATE ...
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... 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 300 C. When using a dedicated tool, all other leads can be soldered in one operation within seconds between 270 and 320 C. 34 Product specification SAA5250 ...
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... Philips customers using or selling these products for use in such applications their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. January 1987 35 Product specification SAA5250 ...