STV8216 datasheet(33/97 Pages) STMICROELECTRONICS

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STV82x6

Note:

The unused bits (defined as reserved) in I²C registers must be kept to zero.

The system clock registers (from address 08h to 0Bh) do not need to be modified if a standard

27 MHz quartz crystal is used

The demodulator registers (from address 0Ch to 54h) default values are optimum and any change

is not recommended, except for:

● AGCS (0Fh) to adjust AGC gain for AM carrier in L/L’ standard (AGC used in open loop)

● CAROFFSET1(22h) and CAROFFSET2(3Ah) to compensate IF carrier frequency with an out-

of-standard offset

● Soundlevel Prescaling PRE_FM(44h), PRE_NICAM(45h) and PRE_AUX(46h) to equalize

demodulated or external audio signal before audio processing. Peak detector registers

PEAK_DET_CTRL(4Bh) and PEAK_DET_STAT(4Ch) can be used to measure internal sound

level.

● Sound source selection for each audio output channel Loudspeaker+Subwoofer, Headphone,

SCART and I²S to be done using CH_SEL(49h)

● In Multi-lingual mode, CH_LANG(4Ah) selects separately the language for each audio output

channel.

● AUTO_CTRL(50h) to select between L/L’ or D/K/K1/K2/K3 standard which can be

discriminated automatically. To be used also to change maximum FM deviation (125 kHz, by

default) in case of wide overmodulation.

● AUTO_SCKM(51h) and AUTO_SCKST(52h) to define the list of mono and stereo standards to

be recognized automatically.

Note:

() used in reset value column means that the bit or the byte is read-only.

(S) symbol indicates that the field value is represented in signed binary format.

(*) The field AGC_ERR[4:0] (AGCS) can be written by user if the bit AGC_CMD (AGCC) is set to

one (by default controlled by AUTOSTD). To be used to adjust manually the input gain of analog

AGC amplifier for AM carrier (L/L’).

9.1

I²C Register Map

By default, all I²C registers controlled by Automatic Standard Recognition System (AUTOSTD) are

forced to Read-only mode for the user. These registers and bits are shaded in Table 10.

Table 10: List of I²C Registers (Sheet 1 of 5)

Name

Addr.

(Hex)

Reset

Value (Bin)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

IC General Control

CUT_ID

00h

(0001 0001)

SRS_ON

CUT_NUMBER[5:0]

RESET

02h

0000 0000

SCLPD_OF

AUTO_OFF

SOFT_LRS

SOFT_RST

CTRL

03h

0000 0000

BUS_EXPAND[1:0]

I²S_EN

SDI_EN

MCK_EN

SYSCK_EN

I2S

04h

0000 0000

I2S_STD

I2S_WSPO

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