Application information

TS4601B

18/28

To write in the control registers:

In order to write data into the TS4601B, after the “start” message, the MCU must:

●

send byte with the I²C 7-bit slave address and with a low level for the R/W bit

●

send the data (control register setting)

All bytes are sent with MSB first. The transfer of written data ends with a “stop” message.

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

message and addressing byte with the slave address.

When writing several bytes, the data is transmitted as follows:

●

CR1 CR2 CR2 CR2... this is an advantage for a fast increase/decrease of the volume

control.

Figure 50.

I²C write operations

To read from the control registers:

In order to read data from the TS4601B, after the “start” message, the MCU must:

●

send byte with the I²C 7-bit slave address and with a high level for the R/W bit

●

receive the data (control register value)

All bytes are read with MSB first. The transfer of read data ends with the “stop” message.

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

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

read repeatedly, CR0, CR1, CR2, CR3, CR4, CR0, CR1 etc.

Table 9.

Control registers summary

Description

D7

D6

D5

D4

D3

D2

D1

D0

CR0

SC_L

SC_R

T_SH

000

00

CR1 - modes

Output modes

0

0

0

0

0

CR2 - volume control

Mute_L

Mute_R

Volume control

CR3

000

000

00

CR4 - identification

010

000

10

SDA

S

11

0

0

0

0

A

00

D7

D7

D0

D1

A

P

Start condition

SLAVE ADDRESS

CONTROL REGISTERS

R/W

Acknowledge

from Slave

Acknowledge

from Slave

Stop

condition

D6

D6

D1 D0

D7 D6

D1 D0

CR1

CR2

CR2

A

A

SDA

S

11

0

0

0

0

A

00

D7

D7

D0

D1

A

P

Start condition

SLAVE ADDRESS

CONTROL REGISTERS

R/W

R/W

Acknowledge

from Slave

Acknowledge

from Slave

Stop

condition

D6

D6

D1 D0

D7 D6

D1 D0

CR1

CR2

CR2

A

A