Reading and writing to the STCF05 registers through the I²C bus

AN2827

22/30

Doc ID 15047 Rev 1

7.4

Reading from multiple registers with incremental addressing

Reading from multiple registers starts in the same way as reading from a single register. As

soon as the first register is read, the register address is automatically incremented. If the

master generates an acknowledge pulse after receiving the data from the first register, then

reading from the next register can start immediately without having to resend the device and

register addresses. The last acknowledge pulse before the STOP bit is not required.

Figure 18.

Reading from multiple registers

S

T

A

R

T

DEVICE

ADDRESS

7 bits

A

C

K

W

R

I

T

E

M

S

B

L

S

B

R

/

W

ADDRESS OF

REGISTER i

A

C

K

M

S

B

L

S

B

S

T

A

R

T

A

C

K

R

/

W

R

E

A

D

DEVICE

ADDRESS

7 bits

DATA i

A

C

K

S

T

O

P

L

S

B

DATA i+1

A

C

K

L

S

B

DATA i+2

A

C

K

L

S

B

DATA i+2

L

S

B

DATA i+n

M

S

B

M

S

B

M

S

B

M

S

B

A

C

K

L

S

B

N

O

A

C

K

SDA LINE

S

T

A

R

T

DEVICE

ADDRESS

7 bits

A

C

K

W

R

I

T

E

M

S

B

L

S

B

R

/

W

ADDRESS OF

REGISTER i

A

C

K

M

S

B

L

S

B

S

T

A

R

T

A

C

K

R

/

W

R

E

A

D

DEVICE

ADDRESS

7 bits

DATA i

A

C

K

S

T

O

P

L

S

B

DATA i+1

A

C

K

L

S

B

DATA i+2

A

C

K

L

S

B

DATA i+2

L

S

B

DATA i+n

M

S

B

M

S

B

M

S

B

M

S

B

A

C

K

L

S

B

N

O

A

C

K

SDA LINE