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SN761678DCHR Datasheet(PDF) 12 Page - Texas Instruments |
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SN761678DCHR Datasheet(HTML) 12 Page - Texas Instruments |
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12 / 21 page  SN761678 TV/VCR TUNER SLES104 − DECEMBER 2003 12 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PRINCIPLES OF OPERATION Table 5. Test Bits (Note 8) T2 T1 T0 FUNCTION 0 0 0 Normal operation 0 0 1 Normal operation (default) 0 1 X Charge pump off 1 1 0 Charge pump sink 1 1 1 Charge pump source 1 0 X Test mode (not available ADC) NOTE 8: Not used for other bit patterns. Table 6. Ratio Select Bits RSA RSB REFERENCE DIVIDER RATIO X 0 640 0 1 1024 1 1 512 (2) I2C Read mode (R/W = 1) Table 7. Read Data Format MSB LSB Address byte (ADB) 1 1 0 0 0 MA1 MA0 R/W = 1 A Status byte (SB) POR FL 1 1 1 A2 A1 A0 A A: Acknowledge Table 8. Description of Data Symbols SYMBOL DESCRIPTION DEFAULT MA1, MA0 Address set bits (see Table 4 address selection) POR Power-on reset flag POR set = power on POR reset = end-of-data transmission procedure POR = 1 FL In-lock flag PLL lock (FL = 1) unlock (FL = 0) A2...A0 Digital data of ADC (see Table 9) Table 9. ADC Level VOLTAGE APPLIED ON ADC INPUT A2 A1 A0 0.6 VCC to VCC 1 0 0 0.45 VCC to 0.6 VCC 0 1 1 0.3 VCC to 0.45 VCC 0 1 0 0.15 VCC to 0.3 VCC 0 0 1 0 to 0.15 VCC 0 0 0 NOTE 9: Note 9: Accuracy is 0.03 x VCC. |
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