SN761678_14 Datasheet, PDF (12/21 Pages) Texas Instruments – TV/VCR TUNER

SN761678
TV/VCR TUNER
SLES104 − DECEMBER 2003
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
X
0
1
RSB
0
1
1
REFERENCE DIVIDER RATIO
640
1024
512
(2) I²C Read mode (R/W = 1)
Address byte (ADB)
Status byte (SB)
A: Acknowledge
Table 7. Read Data Format
MSB
1
1
0
0
0
POR
FL
1
1
1
LSB
MA1
MA0 R/W = 1
A
A2
A1
A0
A
SYMBOL
MA1, MA0
POR
FL
A2...A0
Table 8. Description of Data Symbols
DESCRIPTION
Address set bits (see Table 4 address selection)
Power-on reset flag
POR set = power on
POR reset = end-of-data transmission procedure
In-lock flag
PLL lock (FL = 1) unlock (FL = 0)
Digital data of ADC (see Table 9)
DEFAULT
POR = 1
Table 9. ADC Level
VOLTAGE APPLIED ON ADC INPUT
A2
A1
A0
0.6 V_CC to V_CC
1
0
0
0.45 V_CC to 0.6 V_CC
0
1
1
0.3 V_CC to 0.45 V_CC
0
1
0
0.15 V_CC to 0.3 V_CC
0
0
1
0 to 0.15 V_CC
0
0
0
NOTE 9: Note 9: Accuracy is 0.03 x V_CC.
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