ATMEGA16-16AU SL602 Atmel, ATMEGA16-16AU SL602 Datasheet - Page 177

• Manufacturer Part Number: ATMEGA16-16AU SL602
• Manufacturer: Atmel

2466T–AVR–07/10
Figure 83. Arbitration between Two Masters
Note that arbitration is not allowed between:
•
•
•
It is the user software’s responsibility to ensure that these illegal arbitration conditions never
occur. This implies that in multi-master systems, all data transfers must use the same composi-
tion of SLA+R/W and data packets. In other words: All transmissions must contain the same
number of data packets, otherwise the result of the arbitration is undefined.
A REPEATED START condition and a data bit
A STOP condition and a data bit
A REPEATED START and a STOP condition
Synchronized
SCL Line
SDA from
SDA from
Master A
Master B
SDA Line
START
Arbitration, SDA
Master A Loses
ATmega16(L)
A
SDA
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