S0

A

A

11

1

A3

A2

A1

A0

SLAVE ADDRESS

start condition

R/W

acknowledge

from slave

acknowledge

from slave

1

COMMAND CODE REGISTER

SW02309

0

00

00

0

A

stop condition

acknowledge

from slave

Auto

Increment

DATA CONTROL REGISTER

AI

P

SDA_MST0

SCL_MST0

INT1

INT0

AFTER THE STOP CONDITION, MASTER 1 IS

DISCONNECTED FROM THE DOWNSTREAM

CHANNEL AND MASTER 0 IS CONNECTED

TO THE DOWNSTREAM CHANNEL

IF THE INTERRUPT IS NOT MASKED

(BUSLOSTMSK = 0)

IF MASTER 1 WAS NOT IDLE AT THE SWITCHING MOMENT

AND THE INTERRUPT IS NOT MASKED

(BUSOKMSK = 0)

MASTER 1 HAS CONTROL OF THE BUS

MASTER 0 HAS CONTROL OF THE BUS

MASTER 0 MUST WAIT FOR THE “BUS FREE

TIME” VALUE (BETWEEN STOP AND START)

BEFORE SENDING COMMANDS TO

THE DOWNSTREAM DEVICES

0

0

00

0

00

0

Figure 15. Write to the control register and switch from channel 1 to channel 0 (bus recovery/initialization not requested)