TS4621E

Application information

Doc ID 022201 Rev 1

23/32

Writing to the control registers

To write data to the TS4621E, after the "start" message the MCU must:

●

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

●

send the register address to write to.

●

send the data bytes (control register settings).

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

transmitting several data bytes, the data can be written without having to repeat the "start"

message or send the byte with the slave address. If several bytes are transmitted, they will

be written repeatedly to CR1, CR2 and CR3.

Figure 72.

I²C write operations

Reading from the control registers

To read data from the TS4621E, after the "start" message the MCU must:

●

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

●

send the register address to write to.

●

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

●

receive the data (control register value).

All bytes are read MSB first. The transfer of read data ends with a "stop" message. When

transmitting several data bytes, the data can be read without having to repeat the "start"

message or send the byte with the slave address. If several bytes are transmitted, they will

be read repeatedly from CR1, CR2, CR3 and CR4.

SDA

S

11

0

0

0

0

ACK

00

A7

D7

A0

A1

ACK

P

Start

condition

SLAVE DEVICE ADDRESS

DATA BYTES

R/W

Acknowledge

from slave

Acknowledge

from slave

Stop

condition

A6

D6

D1 D0

D7 D6

D1 D0

REGISTER ADDRESS

CR X

CRX+1

ACK

ACK

AM06115