TDA7514 查看數據表（PDF） - STMicroelectronics

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TDA7514

SINGLE-CHIP FM/AM TUNER WITH STEREO DECODER AND AUDIO PROCESSOR

STMicroelectronics 

TDA7514

Table 34. SUBADDRESS 19: 456KHz VCO Adjustment (manual mode)

MSB

LSB

FUNCTION

D7 D6 D5 D4 D3 D2 D1 D0

0

Enable IFC (I2CBUS)

OFF

1

ON

0

Enable 456KHz VCO adj procedure (I2CBUS) OFF

1

ON

0

0

0

0

0

VCO 456KHz frequency adjust (I2CBUS)

minfreq

1

0

0

0

0

-

-

-

-

-

1

1

1

1

0

0

0

0

0

1

-

-

-

-

-

0

1

1

1

1

1

1

1

1

1

maxfreq

VCO 456KHz frequency adjust mode

0 Manual adjustment procedure (I2CBUS)

1 Automatic adjustment procedure (State Machine)

Table 35. SUBADDRESS 20 : FM Smeter stop threshold, ISS Smeter threshold.

MSB

LSB

FUNCTION

D7 D6 D5 D4 D3 D2 D1 D0

FM Smeter Stop Station threshold

0

0

0

0 400 mV

-

-

-

- step 200 mV

1

1

1

1 3400 mV

FM ISS Smeter threshold (∆ from Softmute thresh. (*)).

0

0

0

0

0 mV

-

-

-

-

step 67 mV

0

1

1

1

467 mV

1

0

0

0

0 mV

-

-

-

-

-

1

1

1

1

-467 mV

(*) Threshold is programmed by byte 14 bits<1:0> according to the following table:

Table 36. SUBADDRESS 14: Soft Mute

MSB

D7

D6

D5

D4

D3

D2

LSB

FUNCTION

D1

D0

Soft mute threshold

0

0 0.3V

0

1 0.4V

1

0 1.6V

1

1 1.8V

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