TS4956 datasheet(6/51 Pages) STMICROELECTRONICS

6 / 51 page

Typical application schematic

TS4956

6/51

In order to read data from the TS4956, after the “start” message, the MCU must send and

receive the following data:

●

send byte with the I²C 7-bit slave address and with the R/W bit set high

●

receive the data (control register value)

All bytes are read with MSB bit first. The transfer of read data is ended with “stop” message.

When transmitting several data, the data can be read with no need to repeat the “start”

message and the byte with slave address. In this case the value of control register is read

repeatedly.

Figure 3.

I²C read/write operation

Table 7.

Output mode selection: G from -34.5dB to + 12dB (by steps of 1.5dB)(1)

SD = Shutdown Mode

G = Audio Gain

MIP = Mono Input Positive

MIN = Mono Input Negative

RIN = Stereo Input Right

LIN = Stereo Input Left

Output Mode #

RHP

LHP

Speaker P/N

Mono L/O

0SD

SDSD

1SD

Gx (MIP + MIN)

GX (RIN + LIN)

GX (MIP + MIN)

4G x RIN

G x LIN

5SD

SDSD

GX (MIP + MIN)

6SD

SDSD

GX (RIN + LIN)

BTL: G x RIN

G x LIN

SDA

D7 D6 D5 D4 D3

Start condition

SLAVE ADDRESS

CONTROL REGISTERS

R/W

Acknowledge

from Slave

Acknowledge

from Slave

Stop condition

Volume Control

settings

Output

Mode settings

D2 D1 D0

SDA

D7 D6 D5 D4 D3

Start condition

SLAVE ADDRESS

CONTROL REGISTERS

R/W

Acknowledge

from Slave

Acknowledge

from Slave

Stop condition

Volume Control

settings

Output

Mode settings

D2 D1 D0

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