MIPSZ2012D3R3 datasheet(26/48 Pages) STMICROELECTRONICS

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Application information

TS4621B

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Doc ID 022194 Rev 2

Table 11.

Control registers at power-up

Writing to the control registers

To write data to the TS4621B, 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 TS4621B, 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 read.

●

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 are

read repeatedly from CR1, CR2, CR3 and CR4.

Description

address

CR1

CR2

CR3

CR4

SDA

ACK

Start

condition

SLAVE DEVICE ADDRESS

DATA BYTES

R/W

Acknowledge

from slave

Acknowledge

from slave

Stop

condition

D1 D0

D7 D6

D1 D0

CR X

CRX+1

ACK

AM06115

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