STW8019 datasheet(50/66 Pages) STMICROELECTRONICS

50 / 66 page

STw8009/STw8019

Bus interface

49/65

Figure 19.

2-wire serial MPU control interface format (I2C compatible) / 10-bit addresses

Figure 20.

2-wire serial MPU control interface timing

8 LSBs

A2 STw8009 register address

* Write operation (10 bits addresses)

STw8009 register data

Can be repeated n times to write in successive registers

STw8009 register address

* Double transaction read

r/w

STw8009 register data

Read (1)

Can be repeated n times to read in successive registers

STw8009 register address A3

* Single transaction read

STw8009 register data

Can be repeated n times

to read in successive registers

r/w

Read (1)

11110

r/w

Write (0)

2MSBs

8 LSBs

11110

r/w

2MSBs

STw8009 slave address

Write (0)

STw8009 slave address

11110

2MSBs

8 LSBs

11110

r/w

2MSBs

Write (0)

STw8009 slave address

8 LSBs

11110

r/w

2MSBs

Write (0)

STw8009 slave address

11110

2MSBs

A/NA

S Start condition

Stop condition A/NA Acknowledge / No Acknoledge

From master to slave

From slave to master

Repeated start condition

8 LSBs

A2 STw8009 register address

* Write operation (10 bits addresses)

STw8009 register data

Can be repeated n times to write in successive registers

STw8009 register address

* Double transaction read

r/w

STw8009 register data

Read (1)

Can be repeated n times to read in successive registers

STw8009 register address A3

* Single transaction read

STw8009 register data

Can be repeated n times

to read in successive registers

r/w

Read (1)

11110

r/w

Write (0)

2MSBs

8 LSBs

11110

r/w

2MSBs

STw8009 slave address

Write (0)

STw8009 slave address

11110

2MSBs

8 LSBs

11110

r/w

2MSBs

Write (0)

STw8009 slave address

8 LSBs

11110

r/w

2MSBs

Write (0)

STw8009 slave address

11110

2MSBs

A/NA

S Start condition

Stop condition A/NA Acknowledge / No Acknoledge

From master to slave

From slave to master

Repeated start condition

tBUF

tHD_STA

tLOW

S=Start

P=Stop

SCLK

SDA

tHD_DAT

tHIGH

tSU_DAT

tSU_STA

tHD_STA

Sr=Start repeated

tSU_STO

P=Stop

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