AN18208A Просмотр технического описания (PDF) - Panasonic Corporation

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AN18208A

Tuner IC for home-audio stereo set

Panasonic Corporation 

AN18208A

„ Technical Data (continued)

y I2C-bus interface (continued)

6. Sub address byte and data byte format (Write mode) (continued)

Tuner-control (Group 2)

SUB-ADD 01H (Write)

Bit

Name

Function

LSB : D0

FAS

FM / AM switch

0 : FM 1 : AM

SD mode switch (FM / AM IF counter)

1 : SD mode (IF counter : ON)

AM AGC-time-constant select

D1

SDS

0 : 500 kΩ 1 : 10 kΩ

IF counter is activated by setting this bit to "1" at I2C stop condition.

And an inside impedance of AM-AGC is changed at AM.

A time constant becomes 1/50 in the case of "1". *1)

Force monaural

D2

FOM

1 : monaural

SUB detection and VCO stop.

So IC is changed to monaural mode

D3

TUS

Selector to force monaural when stereo indicator is off.

0 : ON 1 : OFF

Mute switch

D4

MUS

1 : ON

Output AF buffer amp. mute

FM mode & SDS OFF

D5

FCPS

0 : CP 30 mA fixed

1 : CP selectable (SUB-ADD 00H D7)

PLL-reference frequency selector

D6

RO

RO

FM

0

25 kHz

1

50 kHz

MSB : D7

AMHIS

AM-SD hysteresis control

1 : AM-SD hysteresis ON

Note) *1 : When SDS mode is ON and stop condition of I2C comes, IF count is carried out .

70 ms after the stop condition, a result is ready at read mode.

AM

10 kHz

9 kHz

SDC00079AEB

20

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