TDA9207 datasheet(9/22 Pages) STMICROELECTRONICS

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TDA9207

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Figure 7. DC Coupling

Figure 8. DC Coupling with Feedback (LCD mode)

4.12 Stand-by Mode

The TDA9207 has a stand-by mode. As soon as

the VCC power (Pin 20) gets lower than 3V (typ.),

the device is set in stand-by mode whatever the

voltage on analog VCCA (Pin 7) is. The analog

blocks are internally switched-off while the logic

parts (I2C bus, power-on reset) are still supplied.

In stand-by mode, the power consumption is be-

low 20 mW.

4.13 Serial Interface

The 2-wire serial interface is an I2C interface. The

slave address of TDA9207 is DC hex.

The host MCU can write into the TDA9207 regis-

ters. Read mode is not available.

In order to write data into the TDA9207, after the

“start” message, the MCU must send the following

data (see Figure 9):

– the I2C address slave byte with a low level for the

R/W bit,

– the byte to the internal register address where

the MCU wants to write data,

– the data.

All bytes are sent with MSB bit first. The transfer of

written data is ended with a “stop” message.

When transmitting several data, the register ad-

dresses and data can be written with no need to

repeat the start and slave addresses.

OUTPUT 1,2,3 DC LEVEL

Pins17-19-21

CRT

Driver

TDA 9207

0.5V to 2.5V (8bits)

CRT

Driver

Pins 17-19-21

Pins 15-16-22

CUT-OFF 1,2,3 DC LEVEL

0.5V to 2.5V (8bits)

TDA 9207

11100

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